A network for historic guitars and vihuelas
The plantila looks very much like a French style Panormo guitar a luther friend of mine has and one that I replicate. It is believed to be dated ca. 1826. It does however, have a figure eight peghead and early Panormo style bridge. Richard Brune had or still has a simiar instrument in his collection with what looks to be the same plantilla and the Panormo style machine head. Neither one has the same decoration, flush fingerboard, bridge style nor the chevron decoration of this instrument.
Another thing to take into consideration is that there are a lot of extant instruments that have the Panormo style machine head. These have caused some confusion as most of them, that aren't otherwise identifyable as Panormos, look as they do as a result of later additions.
You may alread be familar with this essay by Gary Southwell but here it is for those that aren't. It is an informative read.
Although there are a few elements to your guitar that are reminicent of the Panormos instruments, until more definitive evidence is available (a label, distinctive workmanship features, personal markings [there is often a P on a transverse brace seen through the soundhole]), my first impression is that it is not one. I'd guess that it is a French instrument that has been altered/repaired, perhaps by one of the Panormos, with a new machinehead.
Maybe Alexander Batov will pipe in. He has many good thoughts on these instruments that are in question.
Hello, this guitar looks very french, made in Mirecourt for the english market as numerous luthiers made to follow the ask. Here a photo for exemple of a Marcard in its original state, with all the "Panormo" style. You should have to examine the blocks, linnings and bracing to learn from wich country is this guitar, but for me it is from Mirecourt, c.1840.