William Irving pocket model revolver Bulletmold, cal .31

William Irving pocket model revolver Bulletmold, cal .31  Flayderman P 358/359, item 7A 035,36 and 37

Approx 2100 made, 

Iron, double cavity double conical ball, no interior neck. 

(out of the late  dick Littlefields  Bulletmold collection of over 400, the largest collection known and  I purchased the collection from his widow)