Pair of silver-mounted French carriage pistols

[NeilUK]

Hi everyone, especially those who are more familiar with 18th century French gunsmiths than me. I recently bought this pair, dated about 1760, and very handsome they are too. The locks are signed Mardier Paris, at least that is the best I can make of it - the engraving is quite worn. The silver escutcheon is clearer - showing a crest of an open hand surmounted by a crown. I cannot find the name Mardier anywhere nor the crest. So any information that you forum colleagues can post will be gratefully received. Thank you.
Neil