pommel markings on m4 bayonet

[chopperbobby]

Got this m4 imperial bayonet ab out 6 months ago. In good condition leather handle.
The Pommel was painted with thick black paint so I could not see any markings on it. So Today I got out the acidton and started cleaning and now can see the markings. It has a Large S Below the "Star" looks like an A (Very top of A is covered by the Star) And a 6 by the rivet or screw for the locking device.
Before cleaning


After:
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Sorry hard to see the A is just above the S and to the left

Everything I have seen says the pommel should be S P?

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