Omega 3539.50.00 (Usato - Buono) — USD 3,817 on eBay

The 3539.50.00 represents Omega's approach to a more compact chronograph within the Speedmaster Reduced series. This reference features a black dial configuration with stainless steel construction throughout both case and bracelet, utilizing a brushed and polished finishing combination. The watch houses an automatic movement driving chronograph complications including a sweep center seconds hand, 30-minute totalizer positioned at 9 o'clock, and 12-hour totalizer at 6 o'clock. The stainless steel case incorporates stainless steel chronograph pushers and mounts a sapphire crystal. Water resistance extends to 100 meters. This reference appeals to collectors seeking automatic chronograph functionality in a reduced case format. The black dial provides contrast against the polished and brushed stainless steel surfaces, while the sapphire crystal and 100-meter water resistance offer practical durability. The automatic movement eliminates manual winding requirements typical of some chronograph references.