I did not know you were only talking vintage stuff.
but then again jack clifford started his business in the mid 50's
I've heard there are other cool alternatives -some still available, some not. Pictures are worth a thousand words!
then again the first string did not mention otherwise ... && it's available and look good on an old bolt.
I ONLY wish I could use half this stuff ie. McGirk & edmunds on my 292 !!! i'm limited because of the 292
my .02