I'm not real pleased with the way this appears to be going and I've exhibited as much grace as I know how. I'm old, I'm patient and always open to being taught. Note the following quotation from the thread you provided from Sam 06....I'm going to do my best to leave this alone and not allow it to turn into an internet debate over nothing....My sincere advice to the OP is to do what I am commited to doing....Shop around, and if you find what "you think" to be a heavy barreled 2" 64, buy it, shoot it, sit in front of the TV, read a book and rub it with a soft cloth...but don't tell a soul what you have....

Best to all....Zebulon
"You got a nice Pistola there for a good price. The model 64 S&W is a S/S Model 10. They came in several configurations and I think the one you have is a good one. You could get them with the heavy barrel or the Thin barrel 2,3 or 4". You have the thin barrel 4". It should have a nice trigger by the way most did.
From the S&W book:
Model 64, .38 SPL Military and Police Stainless Introduced in 1970 with the tapered 4" Pinned barrel square butt K-Frame.
Yours was made before 1982 when they deleted the pinned barrel.
The 3rd addition puts the following value on them:
ANIB $400
EXC $285
VG $250
Good $215
But those are subjective and the market sets the real price. Here are the change numbers:
64 no dash 1970
64-1 1972- intro Hvy BBl
64-2 1977- Gas ring change
64-3 1977-Gas ring change on 4"
64-4 1988- New yoke retention
64-5 1988- Hammer nose bushing and yoke retention on Heavy barrel
64-6 1998- MIM hammer, floating firing pin, internal change
64-7 2002- Key lock
64-8 2004- 2 piece barrel
Like all K Frame S&W it is +P rated. In fact the OKSP had them made in 357 Mag which led to the M65. Yes you can trust your life to it, Plenty of cops did and maybe still do.
PM me if you want me to look up the Serial number for you. Good score and I think your sister will like it. If not send it to me and I will find it a home at little or no cost to you
__________________
The two most abundant elements in the universe are hydrogen and stupidity. "
Note the 64-1 Revision....I know, maybe it referred to the 2", maybe not...See free counsel offered above....Zeb, Out