They look close to the Indian front end, but it's a different geometry. Those are early sporty front end.i have a 49 indian arrow that has forks just like that. also my friend has a front end off of a moto guzzi on one of his bikes and it looks the same too. check out easternfabrications.com speed fedus bike
If you look at the rest of the pictures that were taken at the same time. You would notice that most all big twin bikes had a ribbed British fender and Bates type seat and pee pad. I would venture to say that so does this pan.thanks, Yea its pretty simple. I would love to find some pictures of the back fender and seat and stuff.