Vintage Electronic Calculators: CALCUSEUM Home page

Serial Numbers
Brand and Type Serial Number
KEYSTONE: 100 C253259
KEYSTONE: 1070 81666
KEYSTONE: 1070 88119
KEYSTONE: 108 C375994 (C 375994)
KEYSTONE: 2010 C739405 (C 739405)
KEYSTONE: 2010 C739845 (C 739845)
KEYSTONE: 2010 C743437 (C 743437)
KEYSTONE: 2010 C751302 (C 751302)
KEYSTONE: 2010 C751665 (C 751665)
KEYSTONE: 2010 C754015 (C 754015)
KEYSTONE: 2030 C733889 (C 733889)
KEYSTONE: 2030F C29121 (C-29121)
KEYSTONE: 2030F C29658 (C 29658)
KEYSTONE: 2040 C726794 (C 726794)
KEYSTONE: 2040 C726914 (C 726914)
KEYSTONE: 2050 C248340 (C 248340)
KEYSTONE: 2050 C706132 (C 706132)
KEYSTONE: 2050 C800680 (C 800680)
KEYSTONE: 240 C080561 (C 080561)
KEYSTONE: 260 C110672
KEYSTONE: 280 ?305434
KEYSTONE: 350 C183685
KEYSTONE: 350 (version-1) C247785
KEYSTONE: 350 (version-2) C238964
KEYSTONE: 350 (version-4) C031589
KEYSTONE: 370 C542990
KEYSTONE: 390 0168989
KEYSTONE: 390 C287068
KEYSTONE: 390 C336742
KEYSTONE: 395 C244270
KEYSTONE: 395 C356537
KEYSTONE: 395 C377258
KEYSTONE: 395 C396007
KEYSTONE: 4030 024698?
KEYSTONE: 88 0207925
KEYSTONE: 88 0550252
KEYSTONE: 88 C216432
KEYSTONE: 98 C334418 (C 334418)
KEYSTONE: SC650 C744093 (C 744093)
KEYSTONE: SC650 C751194 (C 751194)
KEYSTONE: SC650 C756848 (C 756848)
KEYSTONE: SC652 C737880 (C 737880)
KEYSTONE: SC652 C747164 (C 747164)
KEYSTONE: SC656 C0826476 (C 0826476)
KEYSTONE: SC656 C0828649 (C 0828649)
21-may-2022 (45 Items)
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