The only part that is nickel plated is the ventilator cap, on the remaining parts there are no residues of nickel. Looks like it is all brass
Thanks Terry I've just solve the problem. It was a mater of rust, that's why I couldn't open it, but with a little help of lub every things OK...
Hi, My name's António, I work at the Portuguese Geographic Institute and I'm the curator of our museum department. The reason I'm posting this...
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