Soemtron ETR224 Calculator Gallery

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Only 526 Soemtron ETR224 printing calculators were made during the units six year production between 1968-1974. By modern standards they are extremely large and cumbersome, but very typical of their age - the 1960s. This section shows a few views of a typical Soemtron ETR224, of which we believe that there are only four left in the world -

A partially working machine in the Historisch-technische Museum in Sömmerda.
Our machine currently undergoing restoration in the www.soemtron.org collection.
One in the hands of a private collector in Sömmerda.
And the fourth machine in the Museum für Historische Bürotechnik in Naunhof.

To date we have found that very little information, if any, exists about the Soemtron ETR224 and certainly no technical information appears to have survived at all.

If you have any further historical information, circuits, drawings, photographs, data or manuals about the Soemtron ETR220, 221, 222 and 224 or their manufacture, test equipment (Prüfgeräte) or you just know more about the Soemtron companies in general then please let us know, contact us.

Currently only five Soemtron ETR224's are known to remain in existence, click image for a larger version

Museum ETR224

One of only four remaining Soemtron ETR224's in existence, click image for a larger version

Inside the ETR224

We have started the restoration of our ETR224, which we expect to take about a year, with progress documented in the pages linked below. Like the ETR220 pages we hope that the information gathered from this process will evolve into a full technical documentation set for the Soemtron ETR224.

Various photos of our Soemtron ETR224 before restoration
Photos of the restoration progress.