I've seen pictures of guns with lightly stamped roll marks that weren't refinished. I don't exactly know how the process of stamping roll marks was done, but I'm sure discrepancies on the depths of the lettering / numbers can vary depending on who was applying them, how quickly they had to gt the job done, and what day of the week it was (Monday or Friday guns
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Here is a good close up of the roll marks on my Feb. 1947 M&P. I'll bet it wasn't a Monday or Friday gun as they look like they are perfectly stamped.
