Pinched frames were only produced on the first 100-200 SAAs which had numerous other small differences until all subtle details were standardized. Like very long loading gates, #1 style ejector rod housing, stampings, etc.ANSWERS:
1. Pinched frame Colt looks like this. It comes from an article we wrote last year on Colt collecting. Buying Colt Single Actions ? A Beginner?s Guide & Unique Auction It should be very helpful to your current situation.
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Pinched frames are often faked by welding up a later Colt and re-milling. But in the photo above you can see the long loading gate on the pinched frame gun on the left; another way to verify (if it hasn't been faked as well). The very early long loading gate rear edge extends almost all the way back to the hammer.
Notice the rear edge of the short loading gate on the right.
I went to the link above. You guys did an excellent job on that site. The zoom in shots are spectacular. I clicked on the 44 Rim Fire lot # and watched the video. I have to tell you though, I was aghast at your “expert” in the video at the bottom. He doesn’t even know to fully cock the hammer before letting it down and he did it on two $100,000 plus rare Colts!!!