Diff of Quartz crystals

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Deleting diff of Quartz crystals

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*Cylindrical can [#pf03cdb9]
Also known as tuning fork type, these are more reliable & rugged.

*Oval can [#o7637d30]
Also known as XY flexure

*NDK [#sdb7335a]
Specialising in quartz crystals, they are still in business. Date codes as follows

-NDK 74F = April 1977

*Toyocom [#nedda182]
Supplied crystal for Casiotron 02

In 1972, 65,000 Japanese quartz watches were produced (0.25% of all Japanese watches), and 16,200 March 1973 alone. [Japan Electronic Engineering, Issues 74-85]