Probably in that era, 54 had an iron head still and by 1959 or 60 they had an alternator in the primary so that small teardrop on the front was gone for a much larger bump to house it. 54 had rear shocks but the iron head like I said. If I could get a good look at the front forks I could narrow it down some more as well as the frame connections.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!