I am selling a Bay-1 red filter. This filter fits most common TLR's such as Rolleiflex, Rolleicord, Autocord, Yashica, etc. The filter is new-in-the box with a case and a data sheet. This filter is multi-coated (somewhat uncommon for Bay-1 filters) and made in Japan to high standards.
Price: $12 including shipping in the USA. I can take a check, money order, or cash.