40798 is pre war, most likely Belgian military. (Too close to the war to be commercial.) Your grips are correct for a pre war Hi Power.
Yours probably has Belgium Government Proofs-- “C” in square and small crown “AC” and small crown “GC”
Possible yours could be -- Belgium Government Proofs-- “C” in six sided box (Transitional proof) and two small crowns “AC” but I think yours is not early enough.
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charlie
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