See photos. I was thinking of just changing the bulb to an LED type but ended up deciding to build a new bow sprit to have something to mount an anchor rope roller onto hanging over the front. That required a change in plan for the bow light so this is now available. $20 cash and it's yours.
Stainless steel. No screws/bolts, just the fixture. 3" high at the front, 7" long on the boat axis, 6.5" wide across the base.
Contact Russ via the available contact data with the ad.