Ah, I blew right past the pattern welded tube type and really didn't think anything of it as it seemed all was well and the tubes were put in a steady state later. Being use to the month/day/year notation, while looking at the "proper" method of dating, I still sat there and typed month/day/year while thinking day/month/year. But you should notice a differnce in the sound of shooting pattern welded and fluid steel. Which isn't really a certified test or anything of the like.

Kind Regards,

Raimey
rse