According to The Illustrated Encyclopedia of Handguns by A. B. ZHUK (one of my very best reference books-hand drawn drawings which are very detailed) this is simply a "Hafdasa" slam fire pistol. If it only had the elongated slit on one side (right side) rather than on both as this appears to have, it would be a Zonda. The Triple K Encyclopedia and Reference Guide For Auto Loading Guns (another great reference book and source for replacement grips and mags) says this gun was made in Argentina in the 1930's and is a very well made gun with a screw on cap at the rear similar to the Sauer. I too would love to have this neat looking gun!!
