Russian Imperf Question

Hello, I have 1957-1958 Soviet Union Scott's 40K 1939 in perforated and imperforate. My Scott's tells me that the other 3 stamps (10,20, and 1R) in this issue exist imperforate but not the 25 or 40k. Now, I didn't cut the stamp myself so I can't attest and I'm not sure there's enough margin to prove imperforate origin. Any ideas or is it just likely perforated and has been trimmed as I suspect? Thx

I can see perf part holes top right corner.
Forgers in general, are not the sharpest knives in the drawer.

I support rod222's opinion - a trimmed off-centered stamp, with remnants of holes going down the right side to the middle of its height.

Thanks for looking and confirming.

I like that phrase...