I picked up a bunch of enlarger goodies on eB*y recently,
including some UDOs (Unidentified Darkroom Objects).
Can anyone tell me what they are, and for what enlarger?
They don't fit my Beseler 45, I think they might be for an
Omega something-or-other.

The first item looks like some kind of turret mounting gizmo,
although it appears incomplete.  It has the number 404-867
stenciled on.  Here are pictures of both sides:

http://users.rcn.com/steveg.ma.ultranet/404-867-1.jpg
http://users.rcn.com/steveg.ma.ultranet/404-867-2.jpg

The second item is a flat disc with a 53mm main hole and
six mounting holes.  It looks like it's a mounting flange of
some sort.

http://users.rcn.com/steveg.ma.ultranet/disc-2.jpg

The third item is a similar disc, undrilled.  It's in an envelope
marked "Simmon Omega" and has the number 421-000.
No picture, it's pretty boring.

The last item is a real mystery.  The disc is spring-loaded
so that the axle can be moved in and out.

http://users.rcn.com/steveg.ma.ultranet/whatsit.jpg

Thanks for any wisdom you can impart.

Steve