Nope, the 64 is the stainless version of the model 10.
It was the 67 that was the stainless version of the model 15,,,
The 67 is the lower left gun.
Aarond
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If those are your's, you have a really nice group showing the best of the best, N-frame 629 guessing a .44 Magnum, L-frame 686 .357/.38, K-frame 67 .38 Special, J-frame 63 .22lr.