4-element Rodenstock Omegaron 50mm f/3.5 enlarging lens for 35mm format negatives
Metal 32.5mm x .5 pitch lens lock ring (jam nut) to secure lenses or #0 shutters with 32.5mm diameter mounting thread to unthreaded enlarger or camera lensboards.
32.5mm to 39mm Leica thread adapter for mounting enlarging lenses with 32.5mm thread on 39mm lensboards.
Omega #421-010 Enlarger Lens Retaining Ring for lenses with 39mm "Leica" mounting thread.
25mm to 39mm Leica thread adapter for mounting Schneider lenses with 25mm thread on 39mm lensboards.
Metal 25mm x .5 pitch lens lock ring (jam nut) to secure lenses with 25mm diameter mounting thread to unthreaded enlarger or camera lensboards.
Beseler #8095 Enlarger Lens Jam Nut (retaining ring) for lenses with 39mm "Leica" mounting thread.
Schneider 24mm diameter plastic push-on type lens cap.