Schnieder-Kreuzanach Componar 135mm 1:4.5 enlarging lens in an Omega D2 cone with cap as shown. Single coated glass shows a small amount of internal fog, one step of Polycontrast (or similar) number should handle it. Lens is permanently attached to the cone, it won't come off without major surgery. 

WHO WE ARE: Oddog2 is a husband/wife team, home-based small business specializing in the buying/refurbishment/selling of primarily photographic equipment. We do occasionally have other types of things to sell that come to us as a result of our search for camera-related items. We have over 50 years of experience with photographic equipment, both as a shooter (17 years newspaper photojournalist) and as a collector/restorer/seller. We have been on eBay as Oddog or Oddog2 since September 1999.