I have two Collins filters that are surplus to my needs. 1. F455 FA 21 6432 Pt.#526 9427 00 For 32S3/32S3A 2. F 250 Z3 Pt#526 9080 00 For KWS-1. I am offering these for best offer. If you interested please e-mail off reflector. Bill Jenkins W5ICS bmjar.1 at juno.com