Arriflex 1:33:1 fiber screen for SR1, SR2, SR3 in N16mm alignment

It is the SR3 version for when set to N16 (You can read SR3 on the screen itself) So the TV lines are updated and less in the way than the ones from the original SR1 and SR2. The screen feels tidier than the older ones.
You may also replace your current SR1 and SR2, N16 screen with better TV lines with this one.