Mike \ all, that is a very important piece of information you gave, that most people, dealers and collectors are not aware of.
' Not all high lip Bormann fuzes are CS made, there are a scarce number made by US manufactures and used in the Civil War."
So, we need to check any high lip fuzes to determine who made them before assuming they are CS manufactured.
1] check the size of the numbers cast on the fuze
2] count the number of 1\4 second ticks before the number one
3] does the fuze have one wrench slot or two cast into it
4] are there any markings in the casting; US, stars, A, directional arrows
5] check for the 90 degree pie piece
anything anybody wants to add, please do.
I know there is something about the underside of the fuze and the amount of tiny holes for the powder train to burn through, that signifies US or CS. But I forget how it goes.