I've posted these pictures on various forums, but never gotten a definitive answer. It was sold as a 1930 Venezuelan Mauser, but is the wrong caliber (8x57) and has no markings identifiable with Venezuela. Serial number is Z6099 and the rifle seems to be all matching. After I got the cosmo cleaned off, it appears that the rifle is pristine, except for a few dents in the stock
http://i.imgur.com/8U5gD9F.jpg?1
http://i.imgur.com/LymeZHV.jpg?1
http://i.imgur.com/M0BPo1x.jpg?1
http://i.imgur.com/HFMYgL4.jpg?1
http://i.imgur.com/ir4mNsj.jpg?1
http://i.imgur.com/8W1vzqX.jpg?1
http://i.imgur.com/uf1HwpQ.jpg?1
http://i.imgur.com/xG1toKB.jpg?1
http://i.imgur.com/6skUAaz.jpg
http://i.imgur.com/lQekwBD.jpg?1