1929 Felix arithmometer from Russia.
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Previously:
https://www.homemadetools.net/forum/...166#post115788
https://www.homemadetools.net/forum/...462#post116963
https://www.homemadetools.net/forum/...959#post137591
https://www.homemadetools.net/forum/...631#post132763
https://www.homemadetools.net/forum/...866#post156408
https://www.homemadetools.net/forum/...000#post157010
https://www.homemadetools.net/forum/...239#post165561
