150mm Linhof select f4.5 Xenar in a Synchro-Compur that I would like to trade for a 6 inch Packard Shutter with a 2 1/2 inch diameter opening - must have Instaneous and Bulb. Glass is in good condition with some minor mottling in the coating on the rear element and the usual dust specks. A very sharp lens for 4x5. Shutter fires on all speeds and actual speeds are shown on photographs. Aperture and shutter blades open and close smoothly and are oil free. Comes with retaining ring.