The “JGA” is a “Velodog: type revolver manufactured by J.G. Anschutz in Zella-Mehlis, Germany during the 1920’s. It is a 7mm center-fire double action revolver with a folding trigger and internal concealed hammer. After World War II, the Anschutz firm gained fame for their high quality hunting and target rifles.
Magazines are available for purchase at Triplek.com