Interesting. Didn't find a picture of the Hemisphere that amounted to anything, but Optics Planet said they have been replaced by the H2O series which are less than $100. I was going by the price and a perhaps foggy recollection of the model number. So if the OP could post a picture or two it would be easy enough to tell if they are Discovers or what.

another link here, show a new price of $70.00

http://www.natchezss.com/brand.cfm?...%20Binocular%20Hemisphere%20Roof%20Prism

Edit to add a Discoverer link. Maybe this will tell the OP what he has
http://www.shopping.com/Bausch-and-Lomb-Discoverer-61-0142-10x42/info

Last edited by SteveC99; 12/02/10.
Steve

Theodore Roosevelt: "Do what you can where you are with what you have"