HELLO PBI !!
Yep...Your right about the 2nd one......Riesch shows it as a late RMC one.
Naturally I just sold a couple like the top one in a auction a few months back.....EXCEPT they only had only one dot missing at 3.
Everything else matched up. This is the first RMC butt plate I've seen with 2 dots missing near the 3'0' clock position.
Neat to learn something new everyday!
Now if the wife would believe that....
DavidB has a picture of a late RMC plate I had never seen before, on his Rock 4,546,xxx....here's a link to that post,
Late RMC butt plates - Military Surplus Collectors Forums

Here's a couple other strange ones I happened upon,

This one was stamped inside out !!



A Good Weekend To You

THANKS,
Charlie