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Cherry serial numbers

See Master vintage keyboards list for additional hints.

Hirose Cherry

Three formats are known so far:

Bare serial

Date structured

Many Hirose Cherry keyboards feature dot matrix–printed labels with the part number and serial number together with one or two of what appear to be QA stamps. The first four digits appear to be the year and month, in either the Japanese or Gregorian calendar (or both in the same keyboard, as was the case with the Xerox 1109 type 2 keyboard.

Model Part Serial Date Reference
SORD M243EX B25-1540A 59120027 59.12.18 (1984-12-18) mousefan.telcontar.net
Unknown B70-4753 85030031 Assumed: March 1985 KBref
Xerox 1109 type 2 B15-2033D (keyboard assembly) 59120159 Assumed: December 1984 deskthority.net
B10-0002A (controller PCB) 84120892

Unknown structured