Important Speedmaster Research by Chronoholic

ndgal · Jan 24, 2022

skand
It is true that January 1967 belongs to the MK1. Mine is one of the last 105.012-65?

The last 105.012-65 that I have in my personal archives was produced on April 18 1967. Serial 24.537.XXX
I also have a 105.012-66 HF with serial 24.536.XXX produced on April 26 1967.

It does seem that around mid April 1967 was the phase out/phase in period of the 105.012-65/105.012-66 HF so expect to see some "Transitional" watches around those production dates.
If you check the stamp inside the caseback of your watch, it shouldn't have an S in front of the 105.012-65 reference.

skand · Jan 24, 2022

ndgal
The last 105.012-65 that I have in my personal archives was produced on April 18 1967. Serial 24.537.XXX
I also have a 105.012-66 HF with serial 24.536.XXX produced on April 26 1967.

It does seem that around mid April 1967 was the phase out/phase in period of the 105.012-65/105.012-66 HF so expect to see some "Traditional" watches around those production dates.
If you check the stamp inside the caseback of your watch, it shouldn't have an S in front of the 105.012-65 reference.

Thanks for this information as it verifies the originality of my watch by the way

darthjord · Jan 25, 2022

Thanks for the great work.
Very enlightening to say the least.
Also, I recognize the mk.1.5 caseback.. The one that I should not have missed!

Important Speedmaster Research by Chronoholic

ndgal

skand

darthjord

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