History of 550004 (No. 29)

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  • 1 (2022-09-12 (Mon) 21:43:32)
  • 2 (2022-09-12 (Mon) 21:45:13)
  • 3 (2022-09-14 (Wed) 21:44:40)
  • 4 (2022-10-02 (Sun) 15:55:07)
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  • 6 (2022-10-06 (Thu) 20:56:31)
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  • 10 (2023-07-29 (Sat) 18:26:50)
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  • 20 (2024-01-28 (Sun) 15:11:15)
  • 21 (2024-05-13 (Mon) 11:02:40)
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  • 23 (2024-05-27 (Mon) 12:05:27)
  • 24 (2024-06-10 (Mon) 10:16:59)
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  • 28 (2025-04-21 (Mon) 11:49:24)
  • 29 (2025-06-24 (Tue) 17:49:02)
  • 30 (2025-07-07 (Mon) 10:35:39)
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  • 37 (2025-12-09 (Tue) 13:35:49)
  • 38 (2025-12-29 (Mon) 12:37:15)
  • 39 (2025-12-29 (Mon) 19:17:33)
  • 40 (2026-08-12 (Wed) 19:03:42)
  • 41 (2026-09-29 (Tue) 22:02:03)
  • 42 (2026-09-29 (Tue) 22:03:09)
  • 43 (2026-10-07 (Wed) 21:56:57)

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The later 550 watch, stainless steel only so far recorded.

Case†

• Stainless steel
• Case back secured by four screws

Dials†

• With or without stone at 12
• Apertures for day & date at 6
• Signed "Ricoh"
• Gloss black
• Silver
• Two tone silver
• Fading brown
• Blue

Parts†

• Battery 2x 303 in insulating sleeves
• Crystal round
• Crystal gasket
• Caseback gasket
• Crown gasket rounded rectangle
• Date corrector gasket

Example serial numbers†

Second digit "2"

325941†

622994†

822256†

822351†

822793†

822814†

822973†

823449†

823647†

825139†

825712†

825829†

??????†

??????†

     

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