History of 570017B(No. 4)

History
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- 1 (2023-07-22 (Sat) 21:13:23)
- 2 (2023-07-22 (Sat) 21:16:37)
- 3 (2023-07-25 (Tue) 20:56:27)
- 4 (2023-08-09 (Wed) 21:45:31)
- 5 (2023-11-16 (Thu) 07:53:51)

Case: Tungsten carbide, two piece screw on back with battery bulge, signed "Riquartz, 570017B Ricoh Japan, 891310", inside caseback marked "9-73" for Sep 1973. Glass crystal with three vertical facets.

Dial: Green stone presumably Bloodstone, with day & date apertures, signed "Ricoh, LSI 32768, Riquartz GTS, Tiger eye, Japan 29 361"

Movement: Calibre 570 quartz, white ceramic circuit, cylinder quartz tube, shock proof jewel setting, signed "Ten 10 Jewels, Three 3 Adj, Ricoh Japan 570".

Example serials†

891310 marked Sep 1973 - This date stamp is the earliest recorded 570 watch.

History of 570017B (No. 4)

Example serials†