Top is barrel weight at the time of proof; 1.369 Kg. If > 3% less it would be considered out of proof
The lettre annale is very faint and may be v for 1983. Possibly not a great year for L-C
The next mark is the post-1968 (post-CIP) Belgian proof house Nitro (PV & le perron) proof
Bottom gauge and chamber length (which typically was east to west, not north to south)

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