The very rough sketch is to indicate the cross section profile and the cutting edges and the blank edges of that profile. The other User IDs currently in use are “ledanda-1”, “ledanda-2” and “ledanda-3”.
William & Dixon Watchmakers Nickel Silver Wire Assorted Sizes w/Brass Container
The circular logo with the letter”F” inside stands for their famous”Fidelity” line of specialized materials, which was highly trusted by watchmakers, jewelers, and precision machinists throughout the 20th century.