Ahhh, so that's the connection between K-22 & 617.
I think Jad explained it to me recently, but it didn't sink in ... until now.
True, but ugaarguy did a better job of explaining it.
Some additional info (it may be a tad off, others feel free to tweek it):
The original K-Frame based 22 was introduced in 1931 as the K-22 Outdoorsman. After WWII when K-22 production resumed (it ceased in December 1940), the Outdoorsman name was dropped in favor of "Masterpiece". The Masterpiece name may have been used just before WWII, I'm not sure.
Though the Model 17 and 18 designations were added after '57, they were still known as K-22 Mastepieces.
K-22 Combat Masterpiece (post '57 Model 18): 4" barrel, discontinued in 1986.
K-22 Target Masterpiece (post '57 Model 17): Mainly 6" barrels, though an 8 3/8" length was added in 1958 a 4" heavy barrel was added in 1986 when the 4" Model 18 was retired. In 1989 the no lug barrel was dropped in favor of a full lug
I'm not sure when the 617 came into the fray and if it replaced the Model 17 or if they were sold side-by-side for a number of years. I'm also not sure if the 617 retains the "K-22" designation like the 17s and 18s did.
I am pretty certain that the 617 is a K Frame. The easiest way to tell would be to hold an L Frame and a 686 side by side and compare the frame width - if the 617 is noticeably narrower, that would seem to confirm that it is a K Frame.
... while looking at Michael's posted (#27) images,
I suddenly saw the Model 64 3" (.38 +P)
as an "intermediate" revolver between
my 642 snub and my 686 .357 mag.
Da'um. This club is going to cost me money.
Ha ha ha! You really are in trouble! Well, we must think alike because I know you've heard me talking about adding an intermediate sized 357 revolver to my small collection one day for IWB or OWB carry. The S&W 2.5" and 3" K Frames fill that roll beautifully, as you've just discovered! Perhaps it's blasphemy to mention it in the K Frame Club, but the Ruger Security/Service/Speed Sixes in 2.75" fit the same bill.
While I'm here, I might as well submit my TWO applications to join The K Frame Club. Now all my guns have a club
except my lone auto Springer XD9
...
S&W Model 14-4 Target Masterpiece:
S&W K-22 Model 17-0 Target Masterpiece: