History of 550003 (No. 11)

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  • 1 (2021-02-04 (Thu) 08:33:17)
  • 2 (2021-02-04 (Thu) 23:46:46)
  • 3 (2021-02-20 (Sat) 09:32:40)
  • 4 (2021-02-20 (Sat) 08:33:30)
  • 5 (2022-09-12 (Mon) 21:19:39)
  • 6 (2022-09-18 (Sun) 21:47:35)
  • 7 (2022-09-24 (Sat) 17:38:01)
  • 8 (2022-09-26 (Mon) 11:44:42)
  • 9 (2022-10-02 (Sun) 16:14:31)
  • 10 (2023-04-15 (Sat) 20:58:10)
  • 11 (2023-07-30 (Sun) 10:56:55)
  • 12 (2023-08-21 (Mon) 21:16:11)
  • 13 (2023-08-21 (Mon) 22:19:05)
  • 14 (2023-11-05 (Sun) 23:27:28)
  • 15 (2023-11-10 (Fri) 12:30:39)
  • 16 (2023-11-10 (Fri) 21:18:01)
  • 17 (2023-11-26 (Sun) 13:38:20)
  • 18 (2023-12-17 (Sun) 23:40:46)
  • 19 (2023-12-25 (Mon) 18:50:17)
  • 20 (2023-12-25 (Mon) 19:04:39)
  • 21 (2023-12-27 (Wed) 23:21:53)
  • 22 (2024-01-06 (Sat) 23:33:03)
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  • 27 (2024-01-16 (Tue) 23:10:17)
  • 28 (2024-01-18 (Thu) 12:39:19)
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  • 30 (2024-01-21 (Sun) 23:58:45)
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  • 32 (2024-01-25 (Thu) 22:50:07)
  • 33 (2024-01-28 (Sun) 15:59:13)
  • 34 (2024-02-17 (Sat) 14:46:46)
  • 35 (2024-03-09 (Sat) 12:51:52)
  • 36 (2024-03-09 (Sat) 23:22:28)
  • 37 (2024-03-18 (Mon) 14:10:56)
  • 38 (2024-05-13 (Mon) 11:10:20)
  • 39 (2024-05-14 (Tue) 21:15:43)
  • 40 (2024-05-27 (Mon) 12:50:54)
  • 41 (2024-06-04 (Tue) 20:32:53)
  • 42 (2024-06-12 (Wed) 18:26:02)
  • 43 (2024-06-26 (Wed) 12:24:56)
  • 44 (2024-06-27 (Thu) 14:14:25)
  • 45 (2024-06-27 (Thu) 14:15:20)
  • 46 (2024-06-30 (Sun) 15:12:39)
  • 47 (2024-07-08 (Mon) 15:01:10)
  • 48 (2024-07-10 (Wed) 21:58:08)
  • 49 (2024-12-01 (Sun) 19:28:21)
  • 50 (2024-12-25 (Wed) 16:00:02)
  • 51 (2025-01-23 (Thu) 15:15:26)
  • 52 (2025-02-03 (Mon) 13:41:09)
  • 53 (2025-02-25 (Tue) 22:53:57)
  • 54 (2025-03-13 (Thu) 23:40:34)
  • 55 (2025-03-14 (Fri) 19:36:49)
  • 56 (2025-03-30 (Sun) 13:11:21)
  • 57 (2025-04-21 (Mon) 14:57:40)
  • 58 (2025-04-25 (Fri) 07:40:12)
  • 59 (2025-05-11 (Sun) 21:20:32)
  • 60 (2025-06-24 (Tue) 17:49:02)
  • 61 (2025-06-25 (Wed) 13:48:38)
  • 62 (2025-11-02 (Sun) 14:13:37)
  • 63 (2025-11-02 (Sun) 14:14:34)
  • 64 (2025-12-29 (Mon) 20:39:32)
  • 65 (2026-01-14 (Wed) 23:07:54)
  • 66 (2026-05-30 (Sat) 22:22:46)
  • 67 (2026-06-15 (Mon) 10:33:07)
  • 68 (2026-09-07 (Mon) 22:02:24)
  • 69 (2026-09-16 (Wed) 19:12:06)

---

Slightly less accurate version of 550002 using the same 550 movement, rated at +-15 sec/month. Available in Stainless steel or gold plated, and with Tiger eye dial or painted.

Mentioned in the 1 August 1973 edition of the Japan Times newspaper, that Ricoh will start selling in late August of 1973.

Cal 550

Cases†

• Stainless steel

Dials†

• Tiger eye
• Painted
  • Two tone silver

Example serial numbers - Case - Movement†

• 133793 - 014425 - Stainless steel
• 133980 - ? - Stainless steel, plain white dial
• 134087 - ? - Stainless steel, black & silver stripe dial
• 134197 - ? - Stainless steel, dial signed “Ricoh Tiger Eye, Riquartz LSI 32768”
• 333243 - ? - Gold plated, Tiger eye

Parts†

• Battery 2x 303
• Crystal
• Caseback gasket
• Crown gasket
• Date corrector gasket

     

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