Now on the Hermann Historic auction site...
Here is the ad's text :
" calibre 9 mm Parabellum. No. "25950". Matching numbers including the grip panels. Matt barrel. Proof marks: BUG. Argentine national coat of arms on the receiver. The extractor is designated "Cargado" in Spanish, the safety with "Seguro". Thumb safety. Almost complete original finish with the only wear marks on the trigger plate and on the front of the grip frame. Small parts yellow. Good dark brown walnut grip panels. Nickel plated folded sheet metal magazine, number removed. Very good to new overall condition. "
Here is the photo :