Just received this Mark 4.5 a few weeks ago, and absolutely love it. The case is pretty good, it keeps excellent time, and the chronograph resets perfectly to zero. I'd read many times that this was a large or chunky watch, and while it certainly isn't diminutive, I find it surprisingly wearable. This review will delve into the specifics of my experience with this iconic timepiece, exploring its design, functionality, history, and comparing it to other models in the Speedmaster family.
The Omega Speedmaster Mark 4.5, often referenced by its reference number 176.0012, occupies a unique space within the Speedmaster lineage. It bridges the gap between the earlier, more tool-watch focused models and the later, more refined iterations. Understanding its place in history is crucial to appreciating its character. This particular model, produced between approximately 1969 and 1971, represents a transitional phase in Omega's Speedmaster production. It’s a fascinating piece for collectors and enthusiasts alike, showcasing the evolution of this legendary chronograph.
Design and Aesthetics:
The Mark 4.5's design is instantly recognizable as a Speedmaster, yet it possesses subtle differences that set it apart from its predecessors and successors. The most striking feature is its case. While not excessively large by today's standards, it's certainly more substantial than some of the earlier Speedmasters. Its 42mm diameter (excluding the crown) makes a bold statement on the wrist, a departure from the more compact cases of previous models. This larger size, however, contributes to its impressive presence and legibility.
The brushed stainless steel case is robust and feels incredibly solid. It exhibits a certain heft that communicates quality and durability. The lugs are relatively short and slightly curved, ensuring a comfortable fit on a variety of wrist sizes. The caseback, typically engraved with the Speedmaster logo and reference number, provides a glimpse into the watch's inner workings, hinting at the powerful Lemania 1873 movement within.
The dial is a classic Speedmaster design, with its characteristic three sub-dials arranged in a tri-compax layout. The sub-dials are clear and easily readable, with the chronograph seconds sub-dial at 9 o'clock, the 30-minute counter at 3 o'clock, and the 12-hour counter at 6 o'clock. The applied baton indices and dauphine hands are elegantly simple, providing excellent contrast against the matte black dial. The luminous material, while possibly not as bright as modern Super-LumiNova, offers sufficient visibility in low-light conditions. The overall aesthetic is one of understated elegance, a blend of rugged tool-watch functionality and refined design.
Movement and Functionality:
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