History of 570022(No. 6) - Riquartz

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- 1 (2021-01-17 (Sun) 16:04:34)
- 2 (2022-10-01 (Sat) 21:08:28)
- 3 (2023-09-29 (Fri) 20:45:02)
- 4 (2023-10-01 (Sun) 21:50:04)
- 5 (2023-12-07 (Thu) 23:15:19)
- 6 (2023-12-10 (Sun) 13:58:44)

Case: Stainless steel, two piece screw on back with battery bulge

Dial: Blue Signed Riquartz DX5, day date

Or

Fading brown signed Riquartz DX10, day [Japanese] date

Calibre 570

Serial numbers†

966600
- Circuit marked AB5
- IC marked 7422 for week 22 of 1974

No number
- Dated Oct 1973
- IC marked 7334 for 34th week of 1973
- Quartz cannister unmarked
- Day wheel in Japanese