Here is a picture showing the inside of the Crouse-Hinds OV-15 with the door removed. The reflector is held inside with a clip at the front like many older cobraheads had.
Yeah Cooper used the clip for the OVS and OVM too. When they created the OVC, it was the first light to use the racoon eye reflector, which was when they started screwing the reflectors in instead of using the clip. The OVS and OVM were the only Cooper-designed fixtures that still used Westinghouse features (other than the gray housing and slipfitter bolts instead of threaded rods).
This version of the OV-15 is really cool. Of course the traditional OV-15 looks better but these look really cool too. These actually look better HPS than MV in my opinion. I think Westinghouse actually designed this to be a lower-cost unit to make HPS more affordable by trimming off the extra parts of the housing. they're very reliable lights. the only real drawback of these is the exposed bolts, which wouldn't have been such an issue if they used rust-proof bolts.
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This version of the OV-15 is really cool. Of course the traditional OV-15 looks better but these look really cool too. These actually look better HPS than MV in my opinion. I think Westinghouse actually designed this to be a lower-cost unit to make HPS more affordable by trimming off the extra parts of the housing. they're very reliable lights. the only real drawback of these is the exposed bolts, which wouldn't have been such an issue if they used rust-proof bolts.