Have you guys ever seen miss stamped drawing numbers before?

I purchased a January 1943 Springfield Armory garand that has an uncut 6 SA oprod.

The attached pic clearly shows an uncut 6 SA oprod with what I believe is the original wartime finish. It isn't a repro. But strangely the drawing number is D35385 instead of D 35382. I figure it was just a misstamp that they didn't catch?

Thanks,
Earl

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