Maxwell Precision Optics Brilliant Matte Focusing Screen with Grid lines for Older Rolleiflex TLR's with non-removable WLF.
Bill Maxwell's best focusing screen for the TLR's as the fresnel focus length better matches the optical path of the TLR's. This is matte screen with grid lines.All the Rollei TLRs with non-interchangeable hoods can take the same size screen (56 mm x 62.5 mm, vertical orientation). Those are the Rolleiflex models E, D, C, B, A, all Automats, all PreWWII models (except for the very first model which used 616 film, which requires a special size screen); the Rolleicord models I, II, III, IV, V (also called Va).
These screens come with a detailed instruction set and some little shims