Old Polish PZO phase contrast kit. It consists of phase contrast condenser, 4 objectives and phase telescope.
The condenser assembly named K3PhZ has NA=1.2 condenser (mount diameter is 39mm), adjustable aperture, set of phase rings on disk with ability to fine tune their centers, detachable polarizator under condenser on dovetail mount.
Phase telescope is simple thing with extending tube to change focus.
Included objectives are:
10/0.24 PhZ, 160/-
20/0.4 PhZ, 160/0.17
40/0.65 PhZ, 160/0.17
100/1.3 OI PhZ, 160/0.17
All parts are in mint unused condition. Some cleaning may be necessary due to age (made in 1979).