Need some help identifying just what solder I have. I bought a twentyfive pound roll of solder with ~18 pounds left on it today for $34.00. I figured even if it was 40-60 it was cheap for tin.
The metal spool is marked- National Lead Co. Dutch Boy Wire Solder Grade 40 Size 11, and it also has a smudged 1102 at the bottom.
The black and yellow steel spool looks like it is from the 1950's or 60's. No address, so I can't date it from the zipcode or lack thereof.
My google-foo isn't working today, all I can find are links to bar solder.
Thanks for the info,