Hello all,

Some years ago I saw a listing of the different S&W revisions with a brief explanation of what was changed with each. I've long forgotten where I saw it, can anyone point me to that again?

Thank you!

This any help ?
Model and Dash numbering system
--------------------------------
Model 10
-1 1959 Heavy Barrel
-2 1961 Changed extractor rod thread to LH on standard barrel
-3 1961 Same as above, for heavy barrel
-4 1962 Screw in front of trigger eliminated
-5 1962 1/10" to 1/8" front sight, on standard barrel
-5 1962 Screw in front of trigger guard eliminated on
heavy barrel model
-7 1977 Change to put gas ring from yoke to cylinder
-8 1977 Change to put gas ring from yoke to cylinder
on heavy barrel model
Model 12 1957
-1 1962 Change extractor rod to LH thread, eliminate
screw in front of trigger guard
-2 1962 Front sight changed from 1/10" to 1/8"
-3 1977 Gas ring on yoke to cylinder
-4 1984 Change frame thickness to same as all K frames
Model 13 No designation used to avoid confusion with air force model
13 air crewman
Model 13
-1 1974 Introduced
-2 1977 Change back to gas ring on cylinder
-3 1982 eliminate cylinder counterbore
Model 14,15,16,17,18,48,53 (all start without dash in 1957)
-1 1959 Change to LH extractor rod thread
-2 1961 Cylinder stop changed, hole in front of trigger
guard eliminated
-3 1967 Relocation of rear sight leaf screw
-4 1977 Changed gas ring from yoke to cylinder
19 All of the above changes and
-5 1982 Eliminate cylinder counterbore

N-Frame Model Blue
------------------

Model 20,21,22,23,24,25 (except 25-5) 26,27,28,29
-1 1960 Change to LH thread
-2 1961 Cylinder stop changed, hole in front of trigger
guard eliminated
-3 1982 Eliminate cylinder counterbore (magnums only)
-4 2004 Thunder Ranch 44 Special, fixed sight
Model 57 1964 Introduced
-1 1982 Eliminate cylinder counterbore
Model 629 1980 Introduced
-1 1982 Eliminate cylinder counterbore
Model 25-5 1978 -5 means 45 Colt caliber
125'th anniversary model, -3 (standard) -4 (delux)
both of these used a shorter than standard cylinder.
-7 1985 45 Colt, 5" barrel, unfluted cylinder
K-Frame Stainless Models
------------------------
64 1970 Introduced
-1 1972 Heavy barrel
-2 1977 2" standard barrel, gas ring from yoke to cylinder
-3 1977 Same as above, for heavy barrel
65 -1 1974 introduced
-2 1977 gas ring from yoke to cylinder
-3 1982 Eliminate cylinder counterbore
66 1971 introduced
-1 1977 Gas ring from yoke to cylinder
-2 1982 Eliminate cylinder counterbore
67 1972 introduced
-1 1977 gas ring from yoke to cylinder
39 1957 start of model numbering system
-1, 1961 Made in 38 AMU cartridge for military 87 made.
52-A -2 1971 Change of extractor
41 1957 start of model numbering system
-1 1960 22 Short chambering
(dash number not always stamped)
52 1961 introduced
-1 1963 Single action only
-2 1971 Changed extractor
52-A See model 39-1
59 1971 introduced, no dash numbers used during production
61 1970 introduced in March
-1 May '70 Add magazine safety
-2 Sep '70 Addition of barrel nut
-3 1971 Forged Al frame
76 1968 introduced, discontinued 1974 no dash numbers used

Small Frame Revolvers
---------------------
Model 30, 31, 32, 33, 34, 35
1957 Start of numbering system
-1 1961 Change from I frame to J frame
36 -1 1967 Indicates 3" heavy barrel
37, 38, 40, 42, 43, 49, 63, 649, 650, 651
No dash numbers ued on above numbers
60 1965 Introduced
-1 1972 Heavy barrel variation made in 1972, not marketed
limited production only

Yes, this does help. Is there a similar list for later, but pre-lock guns?

Thank you.

I believe at various times I have looked up a S&W on Wikipedia and seen the list you are talking about.............

Tons more detail in this. Hardcover, Kindle (free mac/pc software)

__________________
Bob

Perfect, thank you very much!