1950 Omega Sub-Second “Calatrava” • Reference 2638 • Calibre 265 serviced by a professional watchmaker on October 2024 - timegrapher photos available if required, during service, no parts were changed • Stainless Steel Case with approximately 35mm without crown, 37.8mm with crown 43mm lug to lug • Generic strap and buckle • Original Crown • No box or papers