Here are my Speedmaster Duo.

The first was a Grail for me being a Birth Year watch and only missing the date by about three weeks. It's a 2998-4 (1961) on the 7912/6.
The second is my 1967 145.012 pre moon. I've just put it on an original 1960s Komfit bracelet to save the 1039/516.
Both feel wonderful on the wrist and I never tire of admiring them.