[urbanspaceman]

Fernando: thank-you for the script, it is an interesting read, but unfortunately it only goes to the 1600s and I need the first half of the 1700s.

Thank-you Jim. A fascinating look at a mysterious sword.
That BTF has certainly been augmented with an H which probably indicates William Harvey as the Samuel dynasty mostly used SH.
As I have concluded: these blades marked with the BTF and sold in Birmingham were almost certainly made by Oley in Shotley Bridge; and/or....
according to genealogical records there were Oleys down in Birmingham by then and there were also a few in Sheffield .
The details of blade shapes – especially the cross-sections – captured my attention in several respects, mainly however: Bild 67: blade B. refers to 'grooves' and fullers, which is certainly at variance with common parlance that refers to all as fullers, and should also actually indicate the shape of blade C (a Montmorency) not B.
A fuller is actually the name of the tool used to hammer in a groove and is now called a former; what that page refers to as a fuller is actually a hollow.