Hi, have just picked up this revolver along with a black leather with red velvet lined hoster. Some marking questions please ...On top of the strap in front of the rear sight, in gold letters is Depot A lisbonne and under that still in gold is F.A.Ventura. furthur down on the barrel now is (not in gold) Manufre Francse D'Armes St.Etternne. On the r/h of the barrel is some sort of proof mark and st etienne, In front of the cylinder is CJ one side and 531 on the other.under the barrel is 531. Were these dated? Thanks in anticipation.