Mike, Yes, but not always exactly. On the few Utility sets I have examined, most of the have 3 numbers and they will all match on all parts regardless of caliber. Now, on the other guns, the numbers/letters on the bottom of the barrel in front of the lug, and the inside top of the left side of the frame, and under the butt plate in the stock will not necessarily be absolutely the same, but may vary slightly, but it is something you get a feel about after looking at several. I have also found a few forearms stamped with the assembly numbers on NON Utility sets. I know this sounds confusing. But again, Yes, numbers should match, regardless of caliber.