File:Vintage Bowmar Electronic Pocket Calculator, Model MX-50 (aka 90505), Red LED Display, Sealed Battery, Made In USA, Circa 1973 (14591513119).jpg - Wikimedia Commons

Bowmar - Calculator Companies

Virtual Museum of Calculators

PALUMMA 24W/4.8A Dual USB Car Charger, 12V to USB Outlet with Cigarette Lighter Voltage Meter LED/LCD Display Battery Low Voltage Warning (Black) : Everything Else

Category:Calculator collection by Joe Haupt (from Flickr stream) - Wikimedia Commons

Virtual Museum of Calculators

【Premium Material】Made of high-quality plastic, sturdy, thie mini calculator with built-in button cell is durable and has a long service life. 【Pocket

Pocket Size 8 Digit Calculator Solar Mini Basic Standard Calculators Button Battery Desktop Office School Kids Gift Accounting Tools Red

Vintage Bowmar 91801 Pocket Calculator MX40 Red Black w Case Manual & Receipt HP

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Virtual Museum of Calculators

Small Pocket Calculator 8 Digit Display Office Handheld Calculator Red