Please regard the photo embedded below. This is a common enough image. Back in the day, the Panavision PSR ( and perhaps other very early Panavision bodies ) had a magazine cover. It looked just like this. Many of the images I see include the information that reads, " R=200º ".
It seems to me that all camera bodies go out the door ( or, went out the door ) with a 180º shutter unless specifically altered for a shot or project. Note that this information is a part of the molded side of the Magazine barney and not a strip of tape, etc.
Why would the early Panavision bodies have a 200º shutter angle as a default when either a Maltese Cross type ( 90º x 2 ) or a 180º shutter was the standard? And how would this different shutter angle be resolved when projecting prints in a projector that used a Maltese Cross shutter?
Best to all,
Peter Abraham, S.O.C.