Who made these port windows?
 

I think possibly Bomar, but they aren't an exact match, possibly just a change over the yrs.
They are black plastic, with a SS trim ring that just screws on the outside, fitting around the port window frame that is install from the inside. It's not actually a part of the port window itself. I'm looking for the plastic latches on the inside that hold the openable window closed, and sealed.
Thanks

boat is a '95

Defender sells a pretty good selection of hatch dogs. See if you can find the part here. http://search.defender.com/?expression=hatch%20dog&s=1

If not, Google "black hatch dog".

Those are the same ones on my 1990 265 DVX ! But........ i have no idea who makes them. XT is probabley the man what will konw

Found them. ITC