17 in. front wheel with 7" full-width hub, right ?
Mudguard brackets to fork look fairly certainly Enfield. and the guard itself looks vaguely Enfield, but for a 19in. wheel.
Couldn't say which model or year.
If you did manage to mount this guard, it would look quite odd with 17in. wheel under it.
Assuming it is a 17in. wheel, it would be standard on your bike, as are the lower fork sliders. The front fender and stays would have been same as/similar to '59 on Bullet 350 / Crusader 250, chrome or painted.