I am aware of the machete pattern existing in the
period of which we speak (first half 19th century, GR III/IV and VR period) as seen in Brinckherhoff's book, but none with British markings. Could these be from cut-down sword blades? The profile and beefy tip on them reminds me of exported GR examples that we've come across on the forum over the years, noteworthy being a British blade mounted on a Brazilian cutlass in the past. England (and Germany, of course) were exporting blades to the Americas, and in particular, the Spanish colonies. Thus, a Georgian blade on a traditional Spanish-style machete sword seems reasonable-
