Omega Speedmaster 176.0012

Box : Yes Papers : No Age : 1980's Movement : automatic Case Size : 42mm Case : Stainless Steel Dial : Black baton Bracelet : Stainless Steel LOT : 75765 Location : Devon, United Kingdom Seller : BTM1977 Currency : GBP KEY FACTS This Omega Speedmaster 'Mark 4.5' is offered by a private seller in the UK A bold reference featuring distinctive 70's design and a precise chronograph movement The serial number suggests this example was produced in 1980 Presented with an Omega display box, outer box, service receipt dating back to 2023, and parts replaced during service - the original warranty papers are not included Currently covered by Omega's 24-month service guarantee The vendor confirms the watch to be in good working order ABOUT THIS WATCH The Omega Speedmaster Ref. 176.0012, often informally referred to as the 'Mark 4.5', is an eye-catching chronograph released in 1974 Positioned between the Mark IV and Mark V models, it combines the stainless steel case design of the Mark IV with the Omega caliber 1045 movement—an automatic chronograph based on the Lemania 5100 This robust movement was developed during the 1970s in response to the quartz crisis and is recognised for its reliability and distinctive central minutes counter, often referred to as the 'airplane' hand The case design draws clear inspiration from earlier Speedmaster Mark models, particularly the Mark II, featuring similar brushed finishing and integrated case lines, with a slightly taller bezel to accommodate the automatic movement Notably, the caseback is inscribed with "Seamaster," despite the model being unmistakably part of the Speedmaster family The matte black dial includes white day and date windows, tritium-filled stick hour markers, and precise 5-minute interval markings Seven hands are arranged across the dial—an unusual but highly legible configuration enabled by the caliber 1045’s layout As a transitional model, the Ref. 176.0012 represents a compelling fusion of design and function from a transformative era in watchmaking