its SUPPOSED to help stiffen up the front forks so they dont "twist" under cornering/acceleration forces-is there some bits missing in the pic or does it just bolt to the front mudguard? (in which case its about as much use as a chocolate fireguard)
in the days of wimpish spindly fork legs a brace was a positive godsend , but these days i dont think you'd notice much improvement on the bandy-could be wrong mind.
& if you think it looks nice then it wont do any harm-but do you trust yourself not to drill through the front tyre whilst fitting it?