OEM Lights Were Aqua Signal
The OEM lights in 1988 were Aqua Signal. If the masthead light is a single all-around type then it more than likely a 12V/10W festoon bulb, their part number 90400200. If it is a combination light then I don't have this info. Classic parts web info as of Nov 27, 2002: http://www.aquasignal.de/pdf/S026_027.pdf (parts)Clean the contacts on the fixture and put a small dab of dielectric grease on each contact, just enough to coat the metal surfaces of the contact and the bulb end.P.S. The anchor light lens is a twist-lock type with three or four tabs on the bottom. Just get a firm grip on it and rotate it (don't remember which direction). When you remove it notice the tabs on the bottom of the lens as one is larger than the rest. To re-install line up the large tab with the slot where it was when you removed it and twist the lens back on.As long as you're working on this project smear some dielectric grease on the electrical wires where they meet the fixtures contacts (and anything else you want to slow down the corrosion on). The OEM Hunter wires back then were not tin-plated and will no doubt be corroded. Puting some dielectric grease on them now might help to make screw removal later a bit easier.