PIN WHEEL / SPROSSEN-RAD


R E M A R K S :   Pictures are copies from historic sources

The Pin Wheel Photos are taken from the  » FELIKS-M  ARITHMOMETER «
courtesy of Wolf Bluemich Collection

See also:   FACIT's Version of "MODIFIED PIN-WHEELS"  ...

See also:   10s-CARRY for PIN-WHEELS  ...

impressum:
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© C.HAMANN    http://public.beuth-hochschule.de/~hamann    12/11/10