For sale is this Omega 4-Blade Masking Attachment for D series enlargers.
This device sits below the negative carrier and allows you to mask off anything you would like, with ease. Great with a glass carrier and smaller sized negatives, or for cropping down any negative size.
It will work with any D series negative carrier.
Good condition. All the blades move as they should. Not much else you could ask for.
Asking $50 plus shipping.