Originally Posted by Martin Lubojacky
I also agree the blade is probably from 18th century backsword (French ??). As far as four petal design, it is true - from Sierra Leone through Bidda arm daggers to Berber brass bracelets (e.g. in Djebel Nafusa near Tripolis). I also saw them engraved on the sheaths of long and simple yatagans I found on the Djerba Island (Tunisia).
Very probably it is a fantasy - but couldnīt the mark on the blade locally develop from the so called imperial "pome" ?