Product code: 1970s Electric calculator Berkey sold Keystone
Rare 1973 electric calculator Berkey Keystone 370 use charger model 275 5vDC. It has 18 keys. Comes in its own black zippered carry case. No charger. Has not been sold tested. Sold as is how i found it.
Rare 1973 electric calculator Berkey Keystone 370 use charger model 275 5vDC. It has 18 keys. Comes in its own black zippered carry case. No charger. Has not been sold tested. Sold as is how i found it.