As you all know, this particular line of Speedmaster has been around more than 50 years yet it managed to keep its original iconic look albeit having subtle changes over time. Here I have gathered pertinent information summarized in regards to the Speedmaster from across the internet for our convenience.
Few things we need to be familiar with first:
The movement should be an Omega signed, copper coloured 321 or 861 calibre, and the serial marked with eight digits.
On the left is the 861, and on the right is the 321. Both have copper coloured movements, signed by Omega, with eight digit serials.
A more in-depth and detailed listing can be found here: http://chronomaddox.com/romans.html.
Case Types
Straight Lugs:
Examples of each straight lug reference. 2915 2998 105.002 105.003. Note the pushers and crown are exposed.
Asymmetric:
Examples of asymmetric reference 105.012 145.012 145.022-69 145.022-78. Note the pushers and crown are slightly protected.
The case reference is engraved in the inside of the case back. Later references, from 2998-62, carry a two digit year after the reference.
Moving on to more detailed information on each of the watches.
Few things we need to be familiar with first:
- The calibre: 861 or 321
- The movement number. Eight digits.
- The case reference, from inside the case back.
The movement should be an Omega signed, copper coloured 321 or 861 calibre, and the serial marked with eight digits.
On the left is the 861, and on the right is the 321. Both have copper coloured movements, signed by Omega, with eight digit serials.
A more in-depth and detailed listing can be found here: http://chronomaddox.com/romans.html.
Case Types
Straight Lugs:
Examples of each straight lug reference. 2915 2998 105.002 105.003. Note the pushers and crown are exposed.
Asymmetric:
Examples of asymmetric reference 105.012 145.012 145.022-69 145.022-78. Note the pushers and crown are slightly protected.
The case reference is engraved in the inside of the case back. Later references, from 2998-62, carry a two digit year after the reference.
- The asymmetric case came in both calibres,
- The straight lug only carried a 321.
- The 861 was only used in the asymmetric case.
Moving on to more detailed information on each of the watches.
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