Diff of 512012 - Riquartz

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#author("2024-06-04T22:34:30+01:00","default:admin","admin")
#author("2024-06-09T18:50:31+01:00","default:admin","admin")
Case: Rectangular [[Tungsten carbide]], snap on stainless steel case back, two pushers to adjust time. Black leather strap of some quality, possibly crocodile.



Movement: Calibre [[510]] quartz 

Crystal glass rectangular 

Crystal gasket N/A

Caseback gasket 0.6x24.2x23.6mm, 95.6 circumference, 30.4mm diameter

*Examples [#sabcd909]
**Blued dial [#h65af523]
-Dial: Brushed metal, blued, signed “Ricoh, Apex, Riquartz, Japan E-512-20-02” 
--Dated "78-1" for Jan 1978
---IC signed "7G2 841" for 2nd week of July 1977
---Quartz signed "NDK 75F" [presume for May 1977]
---No pusher gaskets

**Stone dial [#bcefa662]
-Dial: Stone

**Snowflake dial [#l1b15878]
-Dial: Silvered Snowflake, signed Ricoh Apex
-Pusher gaskets
--Dated "77-Z" for Dec 1977
---Dial dated "7.3" for mar 1977
---IC signed "7F4 841" for 4th week of Jun 1977
---Quartz signed "NDK 75F" [presume for May 1977]
-Pusher gaskets o-rings 0.7x0.5x1.7mm G36768