Please Help with information on this fish-eye lens!

[damaged_]

I just got this old Astranar fish-eye lens from a guy at work. I haven't been able to find ANY information on it on the internet. I thought he said it was a T-mount so I bought a T-mount to Canon EOS adaptor in hopes of using it with my Digital Rebel but the lens wouldn't fit it. The only identifying marks on the lens is: "Astranar fish-eye lens 0.15x".

Here is a picture of what it looks like. If anyone could tell me what type of mount it is, I would really appreciate it.

[92135011]

what are those green numbers there?

[damaged_]

distance scale, i guess? when i swivel it it changes the aperature ring all the way up to f/90