This is a Marchant "Silent Speed" ACR8D electromechanical calculator from the 1940s. It is currently jammed up, stuck on a division problem it never finished, and is apparently the most complicated mechanical calculator out there. Wish me luck!

Well this is disappointing. While trying to loosen up stuck mechanisms a few teeth broke off of an important gear. Guess this is now a parts machine.

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@kyle when I’m back stateside let’s sync on this. See if I can use my actual degree to get this machine running again. It’d be nice to a) help you out, and b) exercise the machine design parts of my brain.

@ajmartinez That would be fun. At this point I'll need to source a replacement gear at a minimum and then completely remove the control unit to reset all the interlocks. I think the easiest path is to find another parts machine and then make one good machine out of both of them.

@kyle probably the easiest path indeed, but given the common thread through which we met I would wager few who have met either of us ever expect the easiest path to be the chosen one!

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