




OSL489 – 2025 Collection Optima
Model: OSL489
Dial: Rectangular case.
Case size: 20mm
Case material: Stainless steel
Glass: Mineral Crystal
Movement: Swiss Made RONDA Normtech CALIBRE 762
Bracelet/strap: Stainless steel metal band, with butterfly clasp, wide 12mm.
WR: 30 m (3 ATM / 100 ft)
Functions: Centre hour, minute, second at center.
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OSL489 – 2025 Collection Optima