I shouldn't follow the Turner Reich so closely with Protar's! Protar's easily trump TR's (although I like them both and have MANY pictures in the favorites pile made with the TR), and prices reflect that. Here we have 2 really gorgeous factory mounted Bausch and Lomb licensed Zeiss Protar convertibles. I'm going to guess 1940's on the black one and 1950's on the silver one. Both of them are Series VIIa f6.3 models. The black one is 2 identical 16 1/8th inch cells that combine to make a 9 1/4" lens. The 16 1/8 cells are f 12.5 used alone. The scale has both possibilities. The silver one is two 14 3/4" cells that combine to make an f6.3, 7 7/8" lens. Both of the Ilex 3's are running spiffy. Both! of these lenses are usable on 8X10. The 7 7/8 is a little tight. The 9 1/4 has excellent movement on 8X10. Both have gorgeous glass. Both of them will break my heart to have to put in a box and send to a new home. $485 for the black, and $435 for the silver. You pay shipping.