HELPFUL HINTS AND HANDY LINKS
GJ Reference Threads
Alphabetical List of U.S. Manufacturers of Hand Tools
Guide to Logos, Trademarks, etc
GJ’s Quickie Common Collectors’ Tips
Markings on tools, packaging, etc
- The Registered Trademark Symbol (an “R” in a circle) was established in 1946
- Area Codes were established in 1947
- Zip Codes were established 1963
- 'WEAR SAFETY GOGGLES' is an OSHA requirement and the striking tool can be no earlier than 1970
Government stock numbers
- Any marking that looks like this (41-S-1076, 38-B-3345, 13-O-1530, etc), sometimes with a prefix (e.g., N41-S-1076), is a phonetic Federal Standard Stock Catalog number, often called the first Federal Stock Number, and it dates from 1934 to 1952. Administered by the Treasury Dept.-
- Any marking with or without a "DA" or some other prefix or no prefix and an 11-digit number (in groups separated by hyphens, don't count the hyphens, e.g., 5180-698-7964) is a Federal Stock Number (FSN) dating from 1953 to 1961.
- Any marking with a "DSA" and an 11-digit FSN is from 1962 to 1974.
- Any marking with a "DSA" and a 13-digit FSN, adding "00" into the old FSN for a COO code placeholder, is from 1974 to 1977.
- Any marking with or without a "DLA" (Defense Logistics Agency) and a 13-digit NSN (and much more likely to actual have country codes (NATO, very contemporary, not vintage) is from 1978 on.
Strange size markings
Fractional size markings on end wrenches accompanied by “U.S.S.”, “A.L.A.M.”, “S.A.E.”, or a hex symbol and a “C” are nut and bolt sizes, not milled openings sizes, followed by their standard (United States Standard, Association of Licensed Automobile Manufacturers, Society of Automotive Engineers, and Hex Cap). See any wrench chart in any vintage catalog or
Machinery’s Handbook for the milled opening sizes. Wrenches with nut and bolt sizes and standards markings were typically made in the ‘Teens and 20’s, but can be found as late as the 1940’s in some cases.