Used Hotshoe Cover - Original Olympus
Original Olympus black hotshoe cover.
These protect the flash connection on the accessory shoe on top of your camera.
They will fit any of the Olympus models which have the standard flash hotshoe connection.
The Trip was originally supplied with this fitment but most owners lost them. They can tend to become loose over time. To ensure your's fits well, you could simply add a strip of paper between the shoe and the cover to make it a snug fit.
A nice rare, period accessory.