An original Franke & Heidecke Filter Rollei-grün in 28.5 mm size! This green filter is a bayonet mount designed for use with the earlier Rolleiflex TLR cameras, and it is manufactured by Franke & Heidecke in Braunschweig, Germany.

This filter is in very good condition, and it would make a great addition to any collection of vintage camera equipment. Whether you're a professional photographer or a hobbyist, this filter is sure to be a valuable tool in your kit.

Thank you for considering this listing. If you have any questions, please don't hesitate to reach out.