Cheer Lance .
I can confirm that it did come from the toilets as it still had quite a bit of green paint on it when i bought it . It recently went through a shed fire which scorched off all traces of the original paint and shattered the glass . It originally came from a lot of 6 so I'm assuming they were from one whole end .After it survived my fire so well , I'm wondering If they would have needed replacing after the 1936 fire , or if the just replaced the rubber and glass . A recent thread on the breaking up of Bellubera shows a the removal of one of the below deck porthole and it actually appears smaller than mine and has a deadlight shutter as well . I have no doubt to the authenticity of this item as the original owner had no reason to lie as i was actually chasing bits of another vessel and had no real interest in Bellubera at the time . The dimentions are Glass diameter; 23cm , whole diameter inc. rim 38cm and 8 rivet holes , all matching dimentions for the bulwark ends as well . The little model in the shots is about 1:144 scale and was built using a few photos of the ferry . I have since purchased plans of Bellubera and plan to build a larger , more accurate version in the near future.