History of 550004 (No. 38)

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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)
  • 5 (2022-10-06 (Thu) 20:55:19)
  • 6 (2022-10-06 (Thu) 20:56:31)
  • 7 (2023-07-16 (Sun) 13:57:26)
  • 8 (2023-07-16 (Sun) 17:27:09)
  • 9 (2023-07-25 (Tue) 21:08:24)
  • 10 (2023-07-29 (Sat) 18:26:50)
  • 11 (2023-07-29 (Sat) 20:50:54)
  • 12 (2023-07-30 (Sun) 14:58:09)
  • 13 (2023-11-05 (Sun) 16:33:59)
  • 14 (2023-11-08 (Wed) 23:45:18)
  • 15 (2023-11-26 (Sun) 14:04:41)
  • 16 (2023-11-27 (Mon) 12:49:58)
  • 17 (2023-12-17 (Sun) 23:42:50)
  • 18 (2024-01-11 (Thu) 20:49:25)
  • 19 (2024-01-21 (Sun) 16:01:55)
  • 20 (2024-01-28 (Sun) 15:11:15)
  • 21 (2024-05-13 (Mon) 11:02:40)
  • 22 (2024-05-20 (Mon) 11:28:45)
  • 23 (2024-05-27 (Mon) 12:05:27)
  • 24 (2024-06-10 (Mon) 10:16:59)
  • 25 (2025-02-25 (Tue) 22:55:31)
  • 26 (2025-03-22 (Sat) 22:37:57)
  • 27 (2025-04-20 (Sun) 21:23:20)
  • 28 (2025-04-21 (Mon) 11:49:24)
  • 29 (2025-06-24 (Tue) 17:49:02)
  • 30 (2025-07-07 (Mon) 10:35:39)
  • 31 (2025-07-08 (Tue) 22:25:25)
  • 32 (2025-07-24 (Thu) 17:07:27)
  • 33 (2025-09-23 (Tue) 22:00:13)
  • 34 (2025-10-08 (Wed) 22:21:18)
  • 35 (2025-10-14 (Tue) 22:38:21)
  • 36 (2025-11-02 (Sun) 14:16:30)
  • 37 (2025-12-09 (Tue) 13:35:49)
  • 38 (2025-12-29 (Mon) 12:37:15)

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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
• Two styles of hands; Square, or pointed
• Apertures for day & date at 6
• Signed "Ricoh, LSI 32768, [Riquartz logo], Riquartz, Japan"
  • Gloss black
  • Silver
  • Two tone silver
  • Fading brown
  • Blue

Parts†

• Battery 2x 303, in insulating sleeves
• Crystal, round mineral glass
• Crystal gasket, white plastic
• Caseback gasket rounded rectangle
• Crown gasket
• Date corrector gasket o-ring 0.7x0.5x1.7mm G36768

Example serial numbers†

Second digit "2"

325941†

622994†

822156†

822256†

822351†

Original flexible bracelet.

822793†

822814†

822973†

823449†

823647†

823819†

Original mesh bracelet, protective sticker on caseback.

825139†

Original flexible bracelet.

825305†

825712†

825829†

??????†

??????†

     

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