Omega #421-154 4¼" extended lens mount with lens disc for Automega D-3, D-4 enlargers, E, F, and B-series enlargers.
Omega #421-170 flat lens mount with lens disc for Automega D-3, D-4, B, E, and F series enlargers.
Omega #421-172 2" extended lens cone with lens disc for Automega D-3, D-4, plus Omega B, E, and F series enlargers.
Omega #421-188 1½" extended lens cone with lens disc for the Automega D-3 and D-4, and B, E, and F series enlargers.
Beseler 4"x 4" flat metal lensboard with pilot light to accept lenses with 25mm mounting thread.