Case: Tungsten carbide, stainless steel back, screw on battery hatch, signed "[Riquartz logo] Riquartz, A 570001, Ricoh, Japan", faceted glass crystal. Stainless Steel bracelet with faceted links.
Dial: Tiger eye, aperture for day & date
Movement: 570 with oval quartz can, shock proof jewel, movement numbered 011813
New price 170,000 yen (approx $580)
Case: Tungsten carbide, screw on battery hatch, faceted glass crystal, stainless steel caseback signed “Riquartz, Ricoh, Japan, 570001 S”. Movement removed through the crystal, the crystal/bezel is removed with a razor blade. Stainless Steel bracelet with faceted links.
Dial: Bloodstone, yellow stone at 12, some with aperture for day & date, signed “Ricoh, Riquartz”
Movement: Cal 570.