Thanks to all for the helpfull replies, my bike is a very early 48 with a very low 400 engine number & I tend to think it was built in a transitional period as it has a number of items that are 47 such as steel brake drums & not cast a 3 1/2 inch miller instead of a 3, and other items I have noticed so I assume the small head lamp is correct & am led to believe that it should be the fluted lens not the cats eye or diamond.. I do like the look of the larger light & if I come across a reasonable one may go that way but i think my lamp mount brackets will also not be correct & require replacement ?? it never ends .. Thanks again Bill