Yes Cotemar is close.
The hatches are Goiot
Scroll to escape hatch.
and they do have spare parts
Ours were seized shut when we bought the boat. The handles would not turn and the hinges were seized. A lot WD40 under the handles, over several days with a wrench slowly freed everything up. Also with the hinges working them back and forth until I could manage them. The hatches also appeared to be slightly racked and the locking part on the handle would rub against the frame where it turned so we got the grinder and ground off a little of the edge to enable it to close and turn freely. A bit hard to explain. I can take photo
Also in one handle a key in the keyway was missing so when we got the inside to turn the outside did not.
We did wait until we hauled out to do these repairs
as we were worried that it may be a major and we weren't able to fix them satisfactorily.
There was also slight seepage water
damage through one of the attachment screws but it has not appeared to continue to do this since we owned the boat so we leave it for the time being.
Hope this helps.