Maxwell Precision Optics Brilliant Matte Focusing Screen 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 a plain screen with no focusing aids or 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 come with installation instructions and some shims if needed