Oris 751 (Sellita SW200-1 base)

Oris' day-date automatic caliber built on the Sellita SW200-1 with an additional day-of-week display module. Shares the same 38-hour power reserve and 28,800 vph beat rate as the simpler Oris 733. The day display uses the standard bilateral language wheel common to the SW200 platform. Found in Big Crown and aviation-oriented models where the day complication adds practical utility for daily wear.