I am selling a pair of Bay-1 Polarizers. These fit most common TLR's such as Rolleiflex, Rolleicord, Autocord, Yashica, etc. One is for use on the taking lens, the other for the viewing lens (they are most easily used in pairs).
These are new-old-stock (mint) with cases, boxes, and data sheets. Made in Japan.
Price: $32 including USA shipping. I can take a check, money order, or cash in payment.