




OSM488-SL – 2025 Optima Collection
Model: OSM488-SL
Dial: Round dial.
Case size: 40mm
Case material: Stainless steel
Glass: Sapphire Crystal
Movement: Swiss Made RONDA powertech CALIBER 515
Bracelet/strap: Genuine leather strap with butterfly clasp, 20mm wide.
WR: 50 m (5 ATM / 169 ft)
Functions: Center hours, minutes and seconds.
Pairs well with

OSM488-SL – 2025 Optima Collection