Trying to help out a friend via cyber-space - emails and phone texts, etc. ... of which I admit is NOT ideal ...
Said he bought an old selfbow of wood that he is unsure of the species, with recurved tips, but they look (to me) like the non-working or static ones like I see some do on selfbows. I told him of the usual string lengths of longbow strings 3" shorter than the nock-to-nock measurements across the back and -4" for recurves. This bow appears to have ~4"of setback as it braced to about 10". With the set, he measured as 65" N-to-N.
I advised him to unbrace it immediately and yes, his 1st purchase was a good bow stringer. Advise? .. besides a 'longer string', lol? And what would you opine the proper or target brace height range to be?