This Leitz 13.5cm f4.5 lens is an unusual "transitional" Elmar lens with a serial number that theoretically falls in to the Hektor range. It's definitely not a Hektor, though! The serial number is also followed by a red engraved "Y", which is likely not a factory engraving. Cosmetic condition is about standard for lenses of this age, with some paint wear and brassing. Focusing is smooth, optics show very light cleaning marks and very light internal haze. An unusual lens in good working order.