Did anyone see, or get, this? £285 seems like a very low price for it, no? A twelve-key Boosey Pratten’s Perfected:
https://www.ebay.com/itm/Boosey-Co-R-S-Prattens-Perfected-Flute-Antique-C19th-Serial-No-9445-/183562035717?nordt=true&orig_cvip=true&rt=nc&_trksid=p2047675.m43663.l44720
Perhaps it is a high pitched cylindrical flute with a fixed head joint, and therefore not in great demand as regards Irish traditional music?
Siccama system, cylindrical bore.
I obviously don’t know my Booseys! I still thought it would go for more though.
12 keys
hardly Irish-trad worthy