Here's a little write-up I did on a recent purchase: Premier Hi-fi, brass model from around 1967-1970.

Basically I summarize everything I've learned about late-60's Premier metal snares. I hope you find it useful and interesting. Corrections and comments are very welcome!

http://maturedrummer.blogspot.com/2014/12/premier-hi-fi-cob-snare-1967-1970.html

(my non-commercial drum gear blog)