Gillette Tech 1959 (brass or zamac?).

[DiggaDog]

I'm looking at a 1959 E1 Gillette Tech.
It's in great condition, but I don't know what it's made from.
Are the cap and base made from brass, or zamac?
http://www.ebay.com/itm/352086562365?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

I only wanted a good condition cap to fit one of my Techs and found the above Tech complete.
Looks nice, but I really don't want another zamac cap, so hopefully this one is brass?
Thanks.

 

[tonich]

Brass 100 %