I have this Iver Johnson double notch top break, 5 shot, free spinning cylinder, single leaf spring trigger, serial number G749XX, top barrel rib marked "IVER JOHNSON'S ARMS & CYCLE WORKS, FITCHBURG, MASS, USA PAT'D APR.6.86.FEB.15.87. AUG.25.96. PATS PENDING. All this and I still don't know if its a .32 or .38, or what year manufactured.