I have the original opening ports in the head, shower, galley, and aft cabin. I pulled them all out, had them sand blasted, powder coated, and installed new lenses. I found no manufacturer ID on any of them.
Having an opening port above your bunk is great if it doesnât leak. I replaced the port over my aft bunk with a new opening Bomar port years ago and never regretted it. The only trick is to remember to close it before it rains! Unfortunately, this port is slightly smaller than the fixed ports. Iâve never had a leak in my fixed ports.