Well, it is in a bit of a state. The chromework is in need of some polishing up eh? I have a pair of those 350 Bullet stick on tool box decals sitting here on my desk!
The bike has not got the newer air intake position down by the kick start area (eminating from right hand 'tool box') so my guess is it is from around the 1980's but is Indian in originality due to the air filter being marked as Km's? May be a bit out but it's a start. The nut that holds the tappet cover on is the earlier pattern 'original' style rather than the later domed nut, but these are available as a later add-on so???