510
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Start:
Gilt bridge, 5 jewels.
Button B (lower button) advances the time forward by one ...
From [[thewatchforum.co.uk:https://thewatchforum.co.uk/in...
"Ricoh also developed a range of unusual movements aroun...
From Electrifying the Wristwatch
"The Riquartz 510 was still another ladies' watch calibe...
*CMOS IC [#s695045f]
CMOS integrated circuit marked for example "7G2 841" for ...
Example: 3B4 reads as 4th week in February of the year 1...
-A Jan
-B Feb
-C Mar
-D Apr
-E May
-F Jun
-G Jul
-H Aug
-J Sep
-K Oct
-L Nov
-M Dec
*Specification [#kc9265bf]
Battery 384
Consumption 1.3 micro Amps
Battery life in excess of 2 years
Accuracy 15 seconds per month
The anti-magnetic shield under the dial forms part of the...
Very easy to service, with possibly the least parts of an...
*Quartz crystal marks [#od47a535]
-NDK 5ZF for Dec 1975
-NDK 69F for Sep 1976
-NDK 74F for Apr 1977
-NDK 75F for May 1977
-MU7ZN for Dec 1977?
-MU8XN for Oct 1978?
-MU91F for Jan 1979? No
MU possibly for Murata Manufacturing
End:
Gilt bridge, 5 jewels.
Button B (lower button) advances the time forward by one ...
From [[thewatchforum.co.uk:https://thewatchforum.co.uk/in...
"Ricoh also developed a range of unusual movements aroun...
From Electrifying the Wristwatch
"The Riquartz 510 was still another ladies' watch calibe...
*CMOS IC [#s695045f]
CMOS integrated circuit marked for example "7G2 841" for ...
Example: 3B4 reads as 4th week in February of the year 1...
-A Jan
-B Feb
-C Mar
-D Apr
-E May
-F Jun
-G Jul
-H Aug
-J Sep
-K Oct
-L Nov
-M Dec
*Specification [#kc9265bf]
Battery 384
Consumption 1.3 micro Amps
Battery life in excess of 2 years
Accuracy 15 seconds per month
The anti-magnetic shield under the dial forms part of the...
Very easy to service, with possibly the least parts of an...
*Quartz crystal marks [#od47a535]
-NDK 5ZF for Dec 1975
-NDK 69F for Sep 1976
-NDK 74F for Apr 1977
-NDK 75F for May 1977
-MU7ZN for Dec 1977?
-MU8XN for Oct 1978?
-MU91F for Jan 1979? No
MU possibly for Murata Manufacturing
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