“The moment the watch is turned over, time ceases to be a linear abstraction and becomes a living architecture, revealed in light, like a mechanical memory born from the space age.”

Omega Speedmaster Professional reference 145.0808, 42 mm asymmetrical stainless steel case, black dial with three subdials, hesalite crystal on the dial side, sapphire caseback, manual-winding calibre 863 gold-finished movement, Lemania 1873 base, 21,600 vibrations per hour, approximately 48-hour power reserve, aluminium tachymeter bezel, original Omega steel bracelet, production circa 1996, pre-owned watch fully inspected and covered by a 3-year warranty by Mostra.

The Omega Speedmaster Professional 145.0808 carries a rare tension, a watch oriented both toward history and toward its own understanding, where the original instrument begins to reveal itself without ever abandoning its purpose.

There is a presence in the Speedmaster that extends beyond watchmaking itself. It evokes a time when seconds were no longer ordinary units, but critical variables measured in environments where every decision carried weight. The space age shaped this watch, Gemini, Apollo, the silence of space, the precision of controlled movements, the Speedmaster was not designed to symbolize these moments, it accompanied them.On the wrist, the watch retains this discipline. The 42 mm asymmetrical case protects the chronograph pushers within a purely functional architecture. The black Speedmaster dial absorbs light and delivers a perfectly structured reading, where the three counters organize time with instinctive clarity.

The presence of the hesalite crystal is essential. It does not reflect light with hardness, it diffuses it, creating a softer, more organic perception of the dial, faithful to the watches used during NASA missions. This detail alone anchors the watch in the true Moonwatch lineage. The chronograph engages with a firm and immediate response. The gesture is precise, controlled, mechanical. Time becomes something that can be activated rather than simply observed.

Turning the watch over introduces a different dimension. The sapphire caseback reveals the Omega calibre 863 in its gold finish. Bridges, wheels and surfaces appear clearly, forming a readable mechanical architecture that transforms the watch into something to be observed as much as used.

This evolution is significant. For decades, the Speedmaster Professional remained faithful to a closed caseback, dictated by NASA requirements. The movement remained hidden, entirely devoted to function. The emergence of the first sapphire caseback Speedmaster models in the 1990s introduced a new perspective, where the watch could finally be understood visually. The reference 145.0808 belongs precisely to this transition. It stands between two worlds, the pure instrument and the mechanical object conscious of its own construction.

The calibre 863, derived from the 861 and ultimately from the Lemania 1873, represents one of the most reliable chronograph architectures ever produced. Operating at 21,600 vibrations per hour with an approximate 48-hour power reserve, it delivers stability, durability and consistency over time. The tachymeter bezel remains true to the original purpose of the Speedmaster, measuring speed and structuring time. The combination of hesalite crystal on the front and sapphire caseback creates a unique duality, tradition on one side, transparency on the other.

The original Omega steel bracelet extends the watch with coherence, offering both comfort and structural continuity on the wrist. Wearing this Omega Speedmaster sapphire caseback calibre 863 introduces a layered relationship with time. One immediate and functional, the other slower and contemplative, where the movement becomes part of the experience. This example is offered as a pre-owned Omega Speedmaster 145.0808, in excellent overall condition, carefully inspected in our workshop, representing a key moment in the evolution of the Speedmaster.

Selecting a Speedmaster of this generation requires an informed and precise approach. At Mostra, each watch is chosen based on more than 40 years of horological expertise, with particular attention given to authenticity, movement integrity and overall coherence. This watch has been fully inspected and authenticated in our workshop, ensuring it can be worn immediately with confidence. You benefit from personalized guidance, adapted to both collecting and daily use.The watch is delivered with a 3-year warranty, reflecting the quality of our selection and preparation. Mostra is supported by a strong reputation built on 5-star Google reviews and consistent recognition within the professional watchmaking world.

A watch like this does not simply belong to a moment. It continues through time, carried by the one who wears it.