Guess This Tool #6 Revealed and a Dissected

This week's contest was a look inside one of them old-time reckoning boxes.
An iconic image of the last century: the mechanical adding machine. In this dissection we'll look at the basics of how it works. Vin Marshall

Examining clever mechanisms often provides ideas and inspiration for our own designs. This week’s mystery tool was in fact a look at a partially disassembled adding machine. Here’s the rest of that dissection.

Congratulations to Midpipps for nailing it first, then later identifying the brand. Someday we’ll stump you guys.

Check out the adding machine’s dissection gallery here