I lucked out!

[ACORN]

I have a nice Mod 28 I bought used but it was wearing Pachmayr’s, I put targets on for shooting but have been wanting to get a set of Magnas to “restore” it.
Fast forward to the last gun show I attended. A guy had a set pristine set tagged as K frames.
I bought them for $40 figuring they might come in handy.
Today I was going through my grips box and was comparing the ones I bought with a set I had.
The new ones were just a bit bigger.
Turns out they are black washer N frame.
I didn’t know they were that close in size.

 

[stansdds]

Some days you are the windshield, some days you are the bug. Congratulations on having a windshield day.

 

[bananaman]

My Father bought these stocks around 1970. NT357. He had them on a 1905 4th change that shipped 6/ 1919. Obviously they were too big. My Son has the gun and I held on to the grips. On my 28 no dash from 1960. Bob

 

[USBP SW]

Looks like a perfect fit on a perfect revolver, a Highway Patrolman was the first Smith and Wesson revolver I purchased.

 

[chief38]

Sometimes ya luck out!

Once at a LGS I bought a set of what I believed to be K frame, RB diamond grips. When I got home I put them on a 3", M65, RB, K frame and they were a bit too small so I put them back in my storage box figuring they were just a mistake. Decades later I leaned that they were indeed made for the less popular M12! Never owning a M12 I never knew the grips were a tad smaller. I wound up selling the here on the Forum - they were pristine.

 

[Jcon72]

Sometimes ya luck out!

Once at a LGS I bought a set of what I believed to be K frame, RB diamond grips. When I got home I put them on a 3", M65, RB, K frame and they were a bit too small so I put them back in my storage box figuring they were just a mistake. Decades later I leaned that they were indeed made for the less popular M12! Never owning a M12 I never knew the grips were a tad smaller. I wound up selling the here on the Forum - they were pristine.

You and I have somewhat similar stories. About 4-1/2 years ago I bought 3 sets of S&W "J-frame" grips from a LGS, and just like your situation after getting home I found one of the sets to appeared to be K-frames but didn't fit any of my K-frames correctly. During my attempts (in a S&W Facebook group) to determine what model they were for, Michael de Bethencourt private-messaged me with an explanation and ended up buying them from me since he needed a correct set of Model 12 RB Magnas for a comparison he was doing for an article that he was writing.