Thanks all for the helpful comments.
The closer I look the more dubious I am about the bow as so far there's no details of the manufacturer or much about the materials. The shape also looks a little off to my untrained eye. Any comments on this?
Mongolian Bow 50 Lbs $1 res | Trade Me
It can't be strung backwards - look at the string grooves on the top an bottom of the bow, you'd have to carve your own to string it the other way. The only thing I can think of is that someone made it themselves and stuck the top and bottom wooden bits on backwards, or just did a crap job.
That has DEFINITELY been strung backwards!