So a while back I was given three rolls of this old B/W film (it expired in 1981, before I was even *born*)
It's called Agfapan Vario-XL and can be exposed between ISO 125-1600.
Yes, the film canister is metal. When I got it developed I asked for the canister back.
Here's the results of the film, these were taken on a Pentax K1000 with an SMC Pentax-M 50mm 1:1.7 lens. Film exposed at ISO 400. I have the other two rolls (at 125 and 1600) respectively in my Pentax MZ-7 and Nikon F3.