"The second set of barrels are what is called "Manufacture Extra". This nomeclature is from the company catalog of (forgive the missing accent marks) Manufacture Liegeoise d'Armes a Feu. Portions of this catalog are printed in Manfred Sachase's book on damascus steel. At the time of manufacture it appears that these barrrels were 5 times more expensive that the cheapest barrels from this company. This set of barrels have been redone in the classic black & white."


http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=66415&page=4

Better stated, when you see original black on tubes of a Charles Daly example, you can all but be assured it is in the 2nd sequence of serialization.

Cheers,

Raimey
rse