Hi, This sweet-looking lens was discovered while digging through an estate that my employer is preparing for a sale on Sat. It is approx. 10 inches long, four inches wide with a brass body. It has a slot for the insertion of stops (although we did not find any stops), and a sliding mounting collar that can be placed anywhere along the body of the lens. There is no retainer nut on the mounting flange. It has a front cap and a removable lens hood. It's only identifying marks are engraved on the barrel in cursive: "No. 3611 (skip line) Voigtlander & Sohn (skip line) in Wien." It is quite similar to the one in this auction: http://cgi.ebay.com/Antique-Voigtla...39:1|66:2|65:12|240:1318&_trksid=p3286.c0.m14 I am looking for any info on this lens. Focal length, year of manufacture, street value, etc. We are trying to figure out an approximate value so we can decide to either EBay it or let me purchase it. I am hoping it is a little-known lens without a cult following, as I am eager to mess with it. The house is the estate of a retired Cal-Tech professor, and was found in a bottom kitchen cabinet in a box of antique measuring instruments. Could it be an astrophotography lens that she pilfered from a Cal-Tech stockroom using the justification that it would never be used again? Thank you in advance.