This is the first Ricoh quartz watch, released around July 1971, the world's first quartz watch with day & date display. Using the newly developed calibre 550.
According to the 570 technical manual, it was revealed at the New York Hilton Watch & Jewelry show 25-28 July 1971.
Contrary to this, I have seen Seiko 3823 models with day-date with serial numbers dating to May & June 1971.
Cases†
- Stainless steel
- Gold plated
- Back held on by four screws and clamps
- Approx 15mm thick
Dials†
- Day & date apertures at 6
- White stone at 12, possibly a quartz
- Gilt, silvered, or two-tone silver
- Signed "Riquartz, LSI [sine wave] 32768, Ricoh Japan", note that Ricoh is not mentioned on the dial but on the caseback.
Prices†
- 118,000yen gold plated with strap
Battery procedure†
- Remove bracelet
- Remove four screws and four clamps
- Remove inner case containing movement from case
- Remove crown & stem by pressing tab
- Movement can now be carefully removed from caseback
- Negative connection (furthest from crown) should be disconnected, followed by positive
- Replace batteries in insulating sleeves
- Connect positive, followed by negative
- Insert into caseback
- Insert crown
- Insert into case
- Replace four clamps and screws
- Replace bracelet
Parts†
- Battery 2x 303 in insulating sleeves
- Crystal acrylic
- Caseback/crystal combined gasket
- Crown gasket 2x0.8mm
- Date corrector gasket 0.7x0.5x1.7mm G36768
Serial no.†
1st & 2nd digits all 1
115?3?†
115747†
115931†
116235†
119050†
??????†
??????†
![[PukiWiki]](image/pukiwiki.png "[PukiWiki]")
