Zero crank handle for Monroe K calculators

Zero crank handle for Monroe K calculators

thingiverse

I snagged a Monroe model K mechanical calculator from eBay, only to discover that some pesky dog had taken a chunk out of the plastic zeroing crank handle. The result was pretty mangled. In any case, I've come up with a replacement for this piece. This calculator is a real antique, dating back to the early 1920s, and I'd guess its handle is made of Bakelite due to its black color.

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