Hi Neil,
I'll try to describe here what gives Cdt BUCQUOY about your subject
drummer. I'm currently unable to send you a scan of this, sorry about
that.
The drummer wears the regular blue uniform with long basques.
Collar, cuffs, "parements", swallow's nests and basques are medium
green (looks like a light emerald green on the illustration), with a
blue/white/red piping in the usual drummer pattern. The shako sports a
brass losange plate with a cut-out 9 and white cord and rackets.
The drum is black, with blue top and bottom band and white straps.
Sorry for the approximate translation of some elements of this uniform.
Regards
J-P