Ziess Field Glasses?

[Sam56]

Hey guys, I recently came across some pretty old looking Ziess Binoculars. Above the left lens it says "Ziess Stereo Field Glass. Power-8" Above the right lens it says "Bausch & Lantb Optical Co." I don't see any serial numbers on them anywhere. Here are some pictures of them:






Any Idea what they're worth, and maybe some history behind them?


Thanks! :

[fifthgear555]

Don't know the value but here is info for your research.Hope this helps
 1892 - Newly patented series of lenses, anastigmatic photographic, designed by Doctors Abbe and Rudolph, were made by Bausch & Lomb for U.S. distribution under Zeiss license.
here are a few links,,,

http://www.germanheritage.com/biographies/atol/bausch.html
http://www.company7.com/zeiss/history.html