Attached are photos of selected objective lenses…

A green tinted multi-coated 102/1500mm on a 1989 Unitron Model 152 courtesy of Dave Komar

152 Objective 051714

Following photos of Polarex 102/1500mm and 60/500mm; 160/2000mm courtesy of Xavier Debeerst

polarex_102mm+60mm polarex_160mm

Photo of a Polarex 125/2500mm courtesy of Stephen Brennan:

Polarex 5 Inch Objective Lens