Bausch & Lomb Phase Contrast Kit - 4 Objectives, Condenser and Phase Annuli

This is a brand new, old stock item that is still in good working order.  All the objectives are new in their original containers. This was designed for the B&L LR Research Polarizing microscope and the Dynoptic Pol Scope.   The kit includes: 4 Objectives: 10X (10mm) 0.25 NA 21X (8mm) 0.50 NA  43X (4mm) 0.65 NA 97X (1.9mm) 1.25 NA Abbe Condesner with Iris Diaphragm and a slot for the Phase Annuli 4 Phase Annuli to match the objectives 2" Square Green filter  Centering Screws