History of 550003 (No. 25)

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  • 1 (2021-02-04 (Thu) 08:33:17)
  • 2 (2021-02-04 (Thu) 23:46:46)
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  • 59 (2025-05-11 (Sun) 21:20:32)
  • 60 (2025-06-24 (Tue) 17:49:02)
  • 61 (2025-06-25 (Wed) 13:48:38)

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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
• Gold plated

Dials†

• Tiger eye
  • Gold, traditional Tiger eye
  • Green, possibly jasper
• Painted
  • Flat white
  • Fading brown
  • Two tone silver

Prices†

• Stainless steel painted dial 59,000yen
• Stainless steel with Tiger eye dial 64,000yen
• Gold plated with Tiger eye dial 74,000yen

Parts†

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

Book quotes†

"RICOH Ricoh Watch Co., Ltd. Head Office 2-24 Takatake-cho, Higashi-ku, Nagoya 461 (Yokota Building) | Tokyo Office 6-14-6 Ginza, Chuo-ku, Tokyo 104 (Ricoh San-ai Building) def . No 550003 SSW ¥ 59,000 052 ( 931 ) 6185 03 ( 543 ) 3784 His Majesty's great concern for all the people."

Example serial numbers†

1st digit 1 or 3, 2nd digit all 3, 3rd digit 3, 4 or 5

So far all Stainless steel begin with 1, all Gold plated begin with 3332.

     

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