Folding Ensign Carbine Tropicale n°6
 Houghton-Butcher
 Metal body, brown Russian leather bellows
 Device constructed of bright bronze varnished metal, "Florentine" type.
 Houghton produced some very fine tropical folding knives, all characterized by an "oxidized copper" coating (Florentine bronze according to McKeown, therefore a brass with 85% copper and 15% zinc) and a Havana leather bellows.