During the stone age
The RH 50 was a Boy Scout knife made from 1925-1940 with several variations.
If it is the scout knife it with the acorn symbol would be 1923-1926.
They were made from 1923 till 1940
1933-1939
1980
What year was a soulingen Germany knife With fist with three arrows made and what is it worth
1970 to 2006 maybe 2005
The most expensive folding knife is the Nesmuk Folding Knife, crafted by Nesmuk Solingen. It is made with a 5,000-year-old oak handle, 640 layers of carbon steel, and comes with a price tag of around $38,000.
A knife is conductible as the blade is made of steel.
A bread knife is probably made of some kind of steel, but not aluminum.
do you mean numerical quantity or number of different patterns?