Obviously, an incomplete 'h' could look like an 'l', but this is not the case on mine. Witness mark on the bbl. is perfectly aligned. The serial number without the suffix is on the left side of the receiver. The three proofs on the right side of the receiver appear to be No. 31 from the Technical Section. The barrel proof looks very similar to these, if not the same. I took the upper off but didn't see anything, but I'm really not too sure what you mean by 'breechblock'.
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