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Model 66 No Dash
- Thread starter Boatfixx
- Start date
7K1665x is the complete serial number. When the original K prefix serial sequence reached K999999, S&W switched to serial numbers with one digit before the K, using 1K, then 2K, etc. They got all the way up to three digits before the K. Then S&W switched to the three alpha serial numbers.
7K numbers were used in 1974, 1975 and 1976. Your number points to 1974 as the production date.
7K numbers were used in 1974, 1975 and 1976. Your number points to 1974 as the production date.
Thanks Jack, it is old 3rd edition Supica/Nahas
OP
- Joined
- Feb 16, 2009
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- Reaction score
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Thank you, all!
The following is what I have gathered on my new to me Model 66 (no dash) using the 3rd edition of the Standard Catalogue of Smith & Wesson...
I believe it’s an early 66 (1970??) , First Production Model 66 No Dash. Serial # 7K16659
Caliber .357 Magnum/.38 Special double action, built on the K target frame with 3 screws, and pinned barrel, and shrouded extractor rod.
1/8” serrated red ramp front sight.
It has the First Production All Stainless Steel adjustable micrometer click, white outline rear sight.
The cylinder is marked “R” not “F” - “Early production 6-shot counterbored cylinder with a nominal length of 1.67 inches. Later models had non-counterbored cylinders marked “F” with cylinder measure @ 1.62 inches.”
.500” Serrated Target Trigger. YES, I do understand they are specified at .400” for the trigger, but with a micrometer this one is .500” and not .400”
It does have the .500” Serrated Target Hammer.
It has the large “S&W” trademark stamped on right side plate.
It has the 10-groove serrated backstrap, and forestrap.
The following is what I have gathered on my new to me Model 66 (no dash) using the 3rd edition of the Standard Catalogue of Smith & Wesson...
I believe it’s an early 66 (1970??) , First Production Model 66 No Dash. Serial # 7K16659
Caliber .357 Magnum/.38 Special double action, built on the K target frame with 3 screws, and pinned barrel, and shrouded extractor rod.
1/8” serrated red ramp front sight.
It has the First Production All Stainless Steel adjustable micrometer click, white outline rear sight.
The cylinder is marked “R” not “F” - “Early production 6-shot counterbored cylinder with a nominal length of 1.67 inches. Later models had non-counterbored cylinders marked “F” with cylinder measure @ 1.62 inches.”
.500” Serrated Target Trigger. YES, I do understand they are specified at .400” for the trigger, but with a micrometer this one is .500” and not .400”
It does have the .500” Serrated Target Hammer.
It has the large “S&W” trademark stamped on right side plate.
It has the 10-groove serrated backstrap, and forestrap.
You mean it doesn't denote it being a 7-shot????????? Someone lied to me then!!!!!!!! 
The serial number, 7K16659, belies the idea that it is from 1970.
1970 serial numbers were:
K946392 - K999999
1K1 - 1K39500
2K1 - 2K22037
7K numbers didn't start until 1974, as I stated previously. See p. 398 in your 3d Edition, p. 489 in the 4th Edition, p. 584 in the 5th Edition.
The fact that it may have the stainless rear sight is irrelevant. The serial number tells its age. If you don't believe us, spring for a letter from the S&W Historical Foundation.
