Sorry to bump such an old topic, but I've had quite a number of people what the inspiration for the visor on this
bascinet was, and I was never able to do more than tell them it was originally inspired by a few images in the Getty manuscript, both c. 1410. I now have access to the two images this was based around and have revived the thread to post them for those folks who were curious. Hope this helps those of you out who were wanting to see this.
The first image here is from the mounted section of Fiore's section on mounted combat. At first I thought the bascinet pictured here was merely an open faced helm with a marking on the paper creating the illusion of an unusual visor, however, after seeing the second image of what appears to be the same mounted gentleman, I believe them to picture the same bascinet.
As you can see, the visor is raised here and features an ocular which puckers outward. It also appears to feature a section which peaks up over the forehead creating a double layering similar to those seen on later armets. If I have mistaken the first image, this one remains of rather similar construction to the reproduction maxim produced for me. This image also seem to be awfully similar to the visor I posted earlier in the thread, which was featured roughly 35 years earlier.