Correct fuel line (or pipes)

[East_Coast_BSA]

My '59 A10 SR has always had clear fuel line with the braid.  My father bought the bike new and that's what it came with.  I know the Dealer and his brother were very involved in racing.  They brazed a band around the clutch basket as well as brazed the clutch disc retaining studs to the basket and a few other modifications.  People at shows tell me that the line should either be clear (without braid) or solid black.  I can't seem to find anything to really support either.  I see both types for sale as replacement.  I'm guessing this could be something that the Dealer changed before it was sold.  Any input on original line would be greatly appreciated.

[Triton Thrasher]

The commonly available clear hose, with or without braid, is not very good.  It goes hard and can crack.

Black rubber petrol injection hose is ok.

[East_Coast_BSA]

Most of it does because of the alcohol.  It's not kind to anything it touches.  I'd like to know what the bike originally came with, clear or black.