I've just got one of these very good condition vintage Leitz 10x magnification microscope objective lenses spare, bearing the following serial number: 2751.

It's a PV which means it's a Phase Contrast objective and if you look through the rear of the lens barrel you'll see there's a blue/grey Phase ring just about visible at the outer edge of the internal lens elements.  This type of PV lens works well with the Leitz Heine condenser, which as those who've got one will know, can support brightfield, darkfield and Phase just by altering the height of the condenser.

Rare opportunity to grab a quality Leitz objective in fine condition.

The lens is contained in a plastic storage canister and will be well packed and shipped by Royal Mail.

Thanks for looking.