History of 550003 (No. 60)

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  • 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. Released Jul 1972 according to Ricoh manual.

Cal 550

Cases†

• Stainless steel
• Gold plated

Dials†

• None seen with the stone at 12
• 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 painted dial assumption 69,000yen
• Gold plated with Tiger eye dial 74,000yen

Parts†

• Battery 2x 303 in insulating sleeves
• Crystal faceted
• Crystal gasket hard plastic 1x0.4x29mm
• Caseback gasket rubber, rounded rectangle
• Caseback screws four M1.4
• Crown gasket
• Date corrector gasket o-ring 0.7x0.5x1.7mm G36768
• Springbars 18mm

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). Ref 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 13, all Gold plated begin with 3332.

None yet seen with stone at 12.

Example serials†

133303†

133452†

133615†

133793†

133945†

#ref(): File not found: "550003-133945-2.jpg" at page "550003"

133980†

#ref(): File not found: "550003-133980-2.jpg" at page "550003"

134086†

Consecutive number with below.

#ref(): File not found: "550003-134086-2.jpg" at page "550003"

134087†

Consecutive number with above.

134197†

134202†

134232†

#ref(): File not found: "550003-134232-2.jpg" at page "550003"

134366†

134453†

134546†

134623†

134966†

134984†

135038†

#ref(): File not found: "550003-135038-2.jpg" at page "550003"

135052†

135237†

135316†

333216†

333220†

333243†

#ref(): File not found: "550003-333243-1.jpg" at page "550003"

333285†

??????†

??????†

??????†

     

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