This is the lock knob used to secure the red filter assembly in the lens stage of LPL 4x5 enlargers, and to secure the lensboard in LPL 7700 enlargers.
Replacement lower bellows for all Beseler 23C enlargers
Replacement bottom condenser lens assembly for LPL 7700, Saunders/LPL and Omega/LPL 670XL condenser enlargers.
Replacement 6½" diameter lower main condenser lens for Beseler 4x5 condenser lamphouses
Replacement lower condenser lens for the Omega C-700 condenser lamphouse.
Replacement magenta dichroic filter assembly for Super Chromega D and Super Chromega E Dichroic lamphouses.
Replacement 6½" main condenser lens assembly for Omega D-series 4x5 condenser lamphouses
Replacement unmounted main condenser lens for LPL 7700, Saunders/LPL, and Omega/LPL 670XL condenser enlargers.
Replacement 6½" diameter main condenser lens for Omega D-series 4x5 condenser lamphouses
Replacement 3-1/2" diameter main condenser lens for Omega B22 Enlargers or B66 condenser lamphouse
Early type negative carrier adapter for Omega ProLab II 4x5 enlargers.
Later type negative carrier adapter for Omega ProLab II 4x5 enlargers.
Omega #423-959 Negative Carrier Cassette for Omega D5500 4x5 enlargers.
