Digitronic‑M Calculator Repair

During my wan­der­ings on eBay I came across this 12 dig­it dis­play Digitronic‑M cal­cu­la­tor. It was an auc­tion list­ing start­ing at $0.99 with a real­ly low ship­ping cost, and the sell­er list­ed it as “works great!”. I put in a very low bid on it, not expect­ing to win it, but it turned out I was the only bid­der. That was the good part of the transaction.

Eico Digitronic‑M after cleanup and repairs
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Monroe 40 Calculator Refurbishment

An ear­ly hand­held cal­cu­la­tor from 1974, with a 10 dig­it Panaplex dis­play and recharge­able bat­tery.
As I con­tin­ue search­ing for Monroe 400 series cal­cu­la­tors, I came across this Monroe mod­el 40 cal­cu­la­tor at a rea­son­able price, with a few small issues.
Normally I don’t have an inter­est in hand­held cal­cu­la­tors as most are too new. This one caught my eye with it’s unique styling and 10 dig­it Neon Panaplex II display.

Monroe 40 hand­held cal­cu­la­tor side view
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