I have a few brand new, never used CTT / CTS / DAX projector lamps ( bulbs ) . Typical Use: 16mm Projection AND ALSO some other lamps for different projectors Alternate Part Numbers: B-69, 305904, 50460, Sylvania 74620, LIF A1/207, B&H 33459 Can substitute for 1200W CYS, 750W CWA, 500W CZA Bell and Howell Company 16mm 500 Series B&H 550 Filmosound Specialist 535, -T, -Y, 537, 540, 542, 545, -T 550, -T, 552, -T, 556, -T, 541, -T, 545EXT 561, 562 Eiko International ST-0, ST-1, ST-2, ST-3 Filmore Sound Specialist Hoover Brothers, Inc. Da-Master Mark IV Ingenuics, Inc. Invision IN552 RCA Corp. 1600 as well as some other projectors. Only $15 each , small discount if you buy a few possible.