Omega Masking Attachment #7440 4x5" 429-081 6 3/4" Mount Enlarger Part USED F01

Description

Omega Enlarger Part
USED
This is marked #7440 but from what I can see, is the same as the 429-081
A trusted Canadian outfit indicates this is god for B7 and B8 but I am not finding any primary source documentation for all compatibilities
The mounting ring - which has a frozen nut (you may have luck with a penetrating oil) measure approx 6 3/4" diameter but is essentially a pipe clamp, so there is room to finagle things
The largest aperture for your negatives is 4x5" -- see rule I have included in some photos to give a bit of an idea for dimensions
All 4 OEM thumbscrews (plus the 5th at the collar) are included - some may be removed but still included just for safer shipment
See photo(s) - this is the exact item you will get