This black metal 4x5 field camera lens board has a 26mm opening. It is for use with Linhof, Wista, Toyo, Shen Hao, and Intrepid cameras. It has a couple of light scuff marks on its exterior.
Linhof
Orionwerk
VP
Packard
Gundlach
Blair
Graflex
Reflex Camera Yonkers NY