July 30, 2025

Servicing the Vintage Omega Speedmaster Reference 105.012-65 Chronograph

This Omega Speedmaster 105.012-65 came in for a full mechanical service and inspection. The Caliber 321 movement, known for its durability and precision, was carefully disassembled, cleaned, oiled, and regulated. Thankfully, this particular example had been well cared for over the years, and aside from the expected wear, the movement required no major parts replacement. This particular model differs Notably from other Speedmaster models. The 105.012-65 features wider, press-in chronograph pushers—unique to this reference—which are notoriously hard to source. Fortunately, the existing pushers on this watch were in good condition and did not require replacement, although the reset pusher exhibited some wear and needed a minor extension to operate the hour reset properly. Also the crystal currently on the watch (non OEM) was replaced with an Omega OEM crystal exhibiting the barely visible Omega logo in the middle of the crystal.

Omega Speedmaster Reference 105.012-65 History

The Omega Speedmaster 105.012-65 holds a significant place in horological history. It was one of the first Speedmaster references officially qualified by NASA for manned space missions and worn by astronauts during the Apollo program. Introduced in the mid-1960s, it features the Caliber 321 column-wheel chronograph movement and a robust asymmetrical case with crown guards. Its legacy as the “Moonwatch” makes this model particularly desirable among collectors and enthusiasts seeking a historic and highly serviceable vintage chronograph.