Soemtron Calculator Market Trends

Updated January 2025

Two Soemtron ETR220 calculators in Ebay Germany here.

Over the years we have seen many Soemtron calculators appear for sale in various places, mostly Ebay, listed here some of the ones we have managed to keep a track of. Some of the more higher values asked for have not met the sellers expectations, as there is obviousely a percieved market value that buyers place upon the Soemtron ETRxxx range of machines, in spite of the sellers claims of their somewhat "rarity" !.

Spare parts E.G. keyboards, displays, key switches and some circuit boards do seem to sell without too much trouble and at a reasonable cost. Complete ETR's were reasonably priced some years ago (below 100 £/€), with ETR222's commanding slightly higher prices, with one in 2008 reaching €145 after a lot of bids, whilst in 2022 one was prospectively offered at €399 !. The ETR222 is however a very rare machine as only 3,203 were manufactured.

For ETR220's, 2022 has seen speculative offers of €444 and €549, these would again seem rather optimistic as for this model over 155,000 units were built, and they do come up in the markets quite regularly, usually 2-3 a year.

In late 2021 an 8601a Prüfgeräte appeared online and was offered for €1000, it did not sell, however sometime later it was offered to us at the Soemtron website for a more reasonable figure. We took delivery and it has now been completley refurbished to a fully functional and operational state, see Tester 8601A. The 8601a Prüfgerät is a very rare beast indeed as they were manufactured only for factory and field service use with an estimated less than 100 manufactured.

Date	Unit	Source	Sold
January 2025	ETR220 Calculator	Ebay DE (#306016442391)	€351.00 (52 bids)	Shipping €55.00
"Daro Soemtron S#168967 - Rechenmaschine alt antik - Museum Lüdenscheid - 0053" Update 13th January 2025 - This item sold for €351.00 after 52 bids, this makes it one of the most expensive non–working Soemtron ETR220 ever sold via auction. Compare this result with the next Ebay sale shown below for a partially working ETR220. Serial #168967 (image right), this unit appears to be in good overall physical condition and is supplied with the corresponding mains lead. Multiple photos were supplied with general views of all the units sides which also shows that the seven (7) key on the keyboard appears to have been replaced at some point. The unit is advertised as "Keine Funktion - No function." Ebay DE sale number was - 306016442391 Seller = galerie-alte-technik (10836) This auction sale ended on the 13th of January after some very hectic bidding.

Date	Unit	Source	Sold
January 2025	ETR220 Calculator	Ebay DE (#276805398357)	€165.00	Shipping €22.50
"Tischrechner Soemtron ETR 220 Nixie Rechner, Calculator" "Offering an old Soemtrom Daro desktop calculator with Nixie tubes in good optical condition. When switched on, all tubes light up with the value 0, the device does not respond to any further inputs. A suitable power cable is not included. Therefore, selling as a device for repair or as an interesting object of demonstration." Serial #139058 (image right), this unit also appears to be in good overall physical conditionbut does not have the corresponding mains lead. Multiple photos are supplied with general views of all the units sides. The main front photo shows the unit powered up and reset but not working, described as - Ebay DE sale number was - 276805398357 Seller = troedel-teddy Offered for sale on the 3rd of January, the unit sold very quickly on the 6th.

Date	Unit	Source	Sold	Offers
October 2024	ETR220 core Memory Card	Ebay UK	Shipping $36.00 (£27.50)	$180.00 (£138)
"Soemtron 220 Magnetic Ferrite core Memory USSR DDR." "Presented to your attention is a ferrite memory from the Soemtron 220 calculator, the first 3 photos are taken from the Internet, the last 2 photos are real, the board has not been opened or unsoldered, original condition! More detailed description at the link of Frank Robel." - Unsold at 06/10/2024 Update 17th January 2025 - The price for this item has been further reduced to $89.00 Update January 2025 - This item is now on a "Buy it now" sale at $99.00 The memory card for sale (image right) has a missing corner where the extraction hole should be, this has damaged the tracking on the solder side of the board which will render one of the core drivers inoperable and the board non-functional. Images supplied in this Ebay sale were copied from the Soemtron account on Flickr of an ETR220 memory module that we opened for display purposes, these were subsequently reused by Frank Robel (see the link above). The card does not have or deserve a "USSR" designation as all Soemtron produced equipment was designed and manufactured in the then East German GDR by V.E.B. Büromaschinenwerk Sömmerda. This card is common to the ETR220, ETR222 and ETR224 machines, and possibly the ETR221. Although on EBay.com this ETR220 memory card appears to be located in Kharkov, Ukraine. Ebay DE sale number 305818300080 Seller = dimach_68

Date	Unit	Source	Sold	Offers
November 2023	ETR220	Ebay UK (unsold)	Shipping €45	€250 (£215)
"This rare Soemtron ETR220 desktop calculator is a real highlight for collectors and technology lovers. The special Nixie tube display ensures a retro-futuristic look and gives the calculator a unique charm. The used computer is in age-appropriate condition, has scratches, is uncleaned and not functional. Still definitely something for collectors and lovers of old computers to decorate or use as decoration. A suitable power cable is not available." Unsold at 27/11/2023 Although on EBay UK this ETR220 appears to be located in Germany. The text above is translated from German.

Date	Unit	Source	Sold	Offers
October 2023	ETR222	Ebay Kleinanzeigen DE	€190 shipping from €4.50
"Soemtron ETR222 desktop calculator, successor to the ETR220". "The Soemtron ETR222, recognizable by its blue keys, is still extremely rare to find. It is estimated that there are fewer than 10 examples worldwide. A total of 3,203 ETR222s were built in the VEB Robotron Soemerda factory. This one bears the number 74013. The calculation logic used here, mainly consisting of diodes and transistors, is considered a masterpiece in its class. The ETR222 offered is expressly declared as DEFECTIVE. Nixi tubes stay dark! This is often caused by contact errors in the microswitches on the keyboard. A suitable power cable is included!." The text above is translated from German. Located in Poel, an island off Northwest Mecklenburg in Germany, this unit is a rare ETR222 in seemingly very good physical condition but an unknown electrical operational state, listed as "Defective Nixie tubes stay dark". It is not known if this ETR22 actually sold as it is now showing as either "Deleted" or "Out of Stock".

Date	Unit	Source	Sold	Offers
October 2023	ETR220	Ebay UK (unsold)	Shipping $190	$600 (£495)
"Have chaged power supply capacitor on new, its turn on, but keyboard in very bad condition - it stucks, its don't hold on and no reaction on keyboard to work. It's a common problem that described by link 2:) (3 links were removed by EBay however they seem to have pointed to the website of Wolfgang Robel, here). "Soemtron 220 is a calculator produced by the Ernst Thälmann office machine factory (Büromaschinenwerk "Ernst Thälmann") in the city of Sömmerda (the company was called Rheinmetall before the war) in 1969 it became part of the Zentronik Combine, and after the end of production this calculator became part of the Robotron Combine in 1979. The calculator was used in the GDR, Bulgaria, and the USSR. Produced from 1966 to 1977. Based on discrete transistor logic and gas-discharge indicators, built on a cast aluminum frame with external body panels. Uses normal arithmetic notation and has a fixed, switch-selectable decimal point. Has a memory with two registers." Unsold at 20/11/2023 Although on EBay UK this ETR220 appears to be located in the Ukraine. There are several problems with this calculator as seen in the accompanying photo. The unit is partially working as it does show zeros in the display so the main display counter multiplexing system is working, however it will not accept keyboard entries. The display assembly, parts of the keyboard and main card cage show signs of localised overheating serious enough to melt the plastic. The display has sagged, the decimal point lamp holders and many of the keys are deformed and one is missing. The cause might be a displaced insulator panel seen behind the display in the photo, this should be between boards 1 and 2 it the card cage not where it is currently. The description also incorrectly states that the calculator has two registers.

Date	Unit	Source	Sold	Offers
May 2022	ETRxxx 15 digit display	Ebay DE	€93,80
15 pieces of red digit display tube ZM1080 from Soemtron ETR220. This was a complete 15 digit display assembly inculding the wiring and connectors.
May 2022	ETR220 keyboard	Ebay DE	€16,79
Soemtron ETR220 - original keyboard - working.
May 2022	ETR222	Ebay DE		€399
Soemtron ETR222 Desktop Calculator, Calculator, Nixie Tubes.
May 2022	ETR220	Ebay DE		€444
#SE423# Soemtron ETR220 desktop calculator, calculating machine tube Nixie PC classic.
January 2022	EFA381 Prüfgerät	Ebay DE	€150	€1000
Tester for the Fakturiermaschine (Invoice machine) EFA381 from VEB Robotron. Soemtron EFA381 Prüfgerät 8601a, the offer price listed was apparently "symbolic". See Tester 8601A
August 2021	ETR220	Ebay DE Classifieds		€549
Electrical desktop calculator Soemtron ETR220.
November 2021	ETR220	Ebay DE Classifieds		€400
Offering a rare Soemtron ETR200 desktop calculator. An ETR200 does not exist but the picture shown was for an ETR220.
June 2020	ETRxxx switches	Ebay DE	€16
Input circuit board with 8 microswitches and cable (Keyboard switches) 2 boards, not for an ETRxxx caculator but using the same switches.
May 2020	31 pin backplane connectors	Ebay DE	€80
Socket header connector frame assembly, gold-plated contacts RFT DDR. QTY 50, 31 pin plug and socket sets for backplane and circuit cards.
December 2016	ETRxxx keyboard switches	Ebay DE	€2.00
DDR micro switch C3 in orange - 220 V - 4A alternating current.
December 2016	ETRxxx keyboard switches	Ebay DE	€11.50
Robotron Sömmerda "Soemtron ETR220" keyboard for desktop calculator.
October 2015	ETR222	Ebay DE	Unknown
Electronic desktop calculator ETR222 Daro Soemtron calculating machine. Listed as an ETR222 but actually an ETR220.
June 2015	ETR220	ebay.com		£1,500
Soemtron ETR220 Made in GDR old calculator rarity.
August 2008	ETR222	Ebay DE	€145
GDR VEB Soemtron Robotron calculating machine Leipzig Luwi.
December 2007	ETR220	Ebay DE	€53
Calculator Soemtron ETR220 VEB office machines Sömmerda.