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East German clone of a Siemens teletype has a four row keyboard and a third Cyrlic striking positions on the typebars.

@th In RTTY that's sometimes known as '3rd shift cyrillic' - which when you see a mechanical arrangement like that makes so much sense; on 5 bit baudot you need to send a character or number shift character, so you'd now add a 3rd shift for the other language. I'd love to understand how the mechanics knew when to send the shift character.

@penguin42 I assume the "РУС" key shifts into the Cyrillic mode

@th Yeh, I guess so (like it's neighbouring letter shift key); still teletype electromechanics always amazes me.

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