Lesoinne & Pirlot

Let us reason a little:

LESOINNE & PIRLOT street of the University were registered with the proofhouse of LIEGE of 1842 to 1843. They were associated much earlier since they deposit two patents in 1834 and 1840!

The cut off date is 1843, time to which PIRLOT is alone with the orders of the company!

The weapon in question thus could be produced only between 1837 and 1843!

Mark AB crowned in an oval is probably a mark of manufacturer of lock since it is struck the lock. It would be understood badly that it is about a mark of manufacturer of barrels of rifles!

The only manufacturer that I find is (in any assumption?) BERNARD ARMES register with the proofhouse of LIEGE in 1842 until an ignored date? BERNARD had taken again the activity of GENICOT R street St Martin, 56 in LIEGE. Now I donít certify to no case that this mysterious mark is his but it is a possibility.