Olympus PM-CBAD Exposure Control Unit
Used to control a variety of Olympus camera bodies, including the PM-PBS
Reciprocity compensation dial
Film end indicator for the C-35AD-4 camera back.
It has provisions for the electronic flash PM-LSS, Time Lapse Control Unit PM-IVM and Foot Switch PM-FS
Fits Olympus Automatic Exposure Bodies PM-PBA/PM-PBS/PM-PBSP
Used for metering micro graphs