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This is the mass produced movement B21-2 also called Beta 22 of CEH from the Beta 21 Project. This movement was used by Omega under the model name Electroquartz (Caliber 1301) and 15 other swiss brands. The frequency of the Quartz is 8192 Hz, the movement of the hands was done, as in the Bulova Accutron, via an index wheel and a rubin armed index finger. Between 1972 and 1974 appr. 50000 pieces of this movement have been built. This movement is NOS and working.
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