Recently acquired nice 25 Stude Standard Six Duplex Touring from Volo Auto Museum. One headlight not working; current to it; bulb must be burned out. There is a hole at the bottom of both headlight rims; but no screw with which to remove the ring & lense to access bulb. One person thought maybe turn rim 10 degrees & it would pop off. I am able to rotate it 360 degrees; but can not find any spot in which it becomes looser. Rim appears to be "popped" over a lip on the headlight drum. Does anyone have any experience with this unit? Thanks, Dan Caswell, Minot, ND