History of 512012 (No. 6)

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  • 1 (2021-01-16 (Sat) 09:21:33)
  • 2 (2022-09-14 (Wed) 21:08:54)
  • 3 (2022-09-14 (Wed) 21:18:43)
  • 4 (2023-07-30 (Sun) 14:52:47)
  • 5 (2023-11-12 (Sun) 23:01:20)
  • 6 (2023-11-19 (Sun) 15:42:09)
  • 7 (2023-11-28 (Tue) 22:54:15)
  • 8 (2023-11-30 (Thu) 03:59:18)
  • 9 (2024-05-29 (Wed) 21:35:48)
  • 10 (2024-06-04 (Tue) 20:34:30)

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Case: Rectangular Tungsten carbide, snap on stainless steel case back, without crown but two pushers to adjust time

Dial: Brushed metal, blued, signed “Ricoh, Apex, Riquartz, Japan E-512-20-02”

Movement: Calibre 510 quartz

Crystal glass rectangular

Crystal gasket N/A

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

Pusher gaskets N/A

Example†

• Dated "78-1" for Jan 1978, LSI CMOS signed "7G2 841" [possibly for 41st week of 1978?], quartz signed "NDK 75F" [presume for May 1977]

     

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