Jim,
Here are mine, since taking this picture, I have added two 38 Spl nickel with 3" bbls made in 1961 that are 669 #'s apart:
Top left 1952 32NP rechambered to 32 Mag, Top right 1957 38 Spl
Bott left 1951 32NP rechambered to 32-20,
Bott right 1951 32NP rechambered to 32-20; 3" Cobra bbl installed
The two bottom ones are only 66 numbers apart