Here offered is; a classic Omega D-2 4x5" enlarger lens.  It is made by Wollensak 138mm F=4.5.

The image circle will cover 4X5" negatives.

It is mounted in the original Omega lens disk and extension cone for ready to use on 4X5" D and D-2 enlargers.

Over all condition is about average condition and shows some wear on coating and dust specs, but the transmission

of light looks clean and clear for use of darkroom enlargements.