I don’t know if this will help, but here are two enlargements of part of the horn on the Gaunt D.C.L.I. badge:
These show the brassy colour on the back a bit better than the first pictures I put up, as well as that part where the colour seems to be coming through on the front. I don’t know if anyone will be able to tell me if this means that the badge is nickel as Viletone suggests (or maybe nickel plated), rather than being silver plated as I first thought? Any help gratefully received.
Regards
Martin