As it happens we're having a special on Zyn at the moment. This thread has some super info. And it contains links to threads which contain links...
http://www.vintagedrumforum.com/showthread.php?t=46579
As far as the UFiP goes, I'm not sure what "looks like copper" might imply about the composition. B20 is 80% copper and 20% tin. B8 is 92% copper and 8% tin. So there's going to be mostly copper involved in any bronze cymbals.
Does it have either a pressed in die stamp staying UFiP or an ink logo which says so?
This thread:
http://www.vintagedrumforum.com/showthread.php?t=35629
links back to this thread:
http://www.vintagedrumforum.com/showthread.php?t=33679
which shows some of the cymbal styles and die stamps.
I've been collecting up bits of info in a file on the way to putting together a timeline. But I haven't drawn it all together yet. And I certainly haven't identified all the conflicting information and come to some conclusions about the quality of the evidence supporting the different claims. All of which is by way of saying I've got more info than just in those threads I linked to, and I've got more photos of different die stamps and ink styles as well. So if you can post pictures of yours, I'm happy to see what I've got on file.
Note, I started out on this because I found RobScott
http://robscott.net/cymbals/italian-cymbals/
quite incomplete, and decided we could do better. RobScott sometimes gives the years a company was operating, but it isn't the sort of timeline which shows how the die stamp and ink patterns changed over time.