'69 Z/28 Muncie M21 Date Code - Missing digit?? "P903B"

[Lenny D]

Is anyone aware of any irregularities in date codes on early '69 Muncies?  Here's a pic of my (believed to be original) M21 in my '69 Z/28. 
02D build date on the car, partial serial number is correct - what you can see of it.  It looks like the month code is missing - I would expect it to be "P9A03B" perhaps; but it simply shows "P903B"??   ... Also, the "B" appears to be inverted?

I'm relatively confident this is the born-with transmission.  I bought the car from older owners (long-time friends) who have had it since 1974.  To their knowledge the transmission was never replaced (or they forgot); and if it was in the early days, did people bother to re-stamp back then?  Nobody cared about numbers when these cars were nearly new...

As the car has a CE engine (replaced under warranty in '71); it's possible the transmission was replaced under warranty as well at some point. 
Would there have been different date designations for warranty Muncies which may explain this?

Thanks in advance!

[jdv69z]

Replacement would not have had VIN number stamped. I would guess original.

[KurtS]

Sorry, I think it's a restamp. Fonts are wrong.

[bcmiller]

Picture isn't great but I agree. Doesn't look real.

[Lenny D]

Thanks guys - appreciate it.  Who knows what happened here, but it's odd that somebody would know enough to restamp a trans in the right spot, but not know enough to put the month code in.  Does anybody have any pics of another M21 "B" transmission code stamp that you could post for comparison? 

Thanks, Len