This sale is for an very rare, possibly unused but certainly mint condition Bronica SQ split image / microprism focusing screen – suitable for all Bronica SQ series cameras (SQ, SQ-A, SQ-Ai, SQ-Am and SQ-B).
It has no signs of use. It is boxed, but in the wrong (grid screen) box.
This screen would be great in its own right as a focusing screen, or as a replacement for your existing damaged screen. Try finding another one! Even harder – try finding one in mint condition.