Uploaded January 2026 | Updated September 2026, 2 hours ago

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The Schildkröt Minirechner 99 is a remarkably sophisticated toy calculator from about 1971. The 2-digit total is displayed as numbers as well as columns of dots.

For more information about this and other machines in my collection, please visit my website:
jaapsch.net/mechcalc

0:00 Introduction
0:40 Addition
1:46 Subtraction
2:25 Multiplication
3:31 Division
4:06 Shutter, notepad
4:29 Inventor
4:46 Outro