NOTE: I found this posted on another forum and the one who posted it got it from someone else...so I place it here for reference to assist in the identification of US uniforms. Since the info does NOT belong to the guy who posted the info..I do not hesitate to use it here. I make NO claims about the ownership of this info, as I am merely just passing it on.
Military procurement was done through the Defense Supply Agency 1962-1977 and all contracts had a DSA prefix. The dates were by fiscal year...July 1 through June 30. Fiscal year 1962 had a DSA 1 prefix and E-62 suffix. 1963 and 1964 were the same but substitute "63" or "64" in the suffix. Fiscal year 1965 will just have the DSA 1 prefix and no date code. Fiscal year 1966 will have a DSA 100 prefix and no date code. Starting in 1967 there will be a DSA 100 prefix plus a two digit date code. So, for example, fiscal year 1968 contracts will have a DSA 100-68 prefix.
Contract numbers
WW2 - 195? no prefix - Contract for U.S Marine Corps (BuSandA symbol, stamped in sleeve)
1946 - 195? "Supply Department of the United States Marine Corps" and date (stamped in sleeve)
1953 – 1961 DA (Defense Agency)
confirmed examples of contract numbers: 1957 – 1961 DA prefix on the tag
1962 – 1977 DSA (Defense Supply Agency)
confirmed examples of contract numbers: 1962 – 1977 DSA prefix on the tag
1978 – 1993 DLA (Defense Logistic Agency)
confirmed examples of contract numbers: 1978 – 1993 DLA prefix on the tag
1994 – 2003 SPO (System Program Offices)
confirmed examples of contract numbers: 1994 – present SPO prefix on the tag
Stock numbers
194? - 1954 example of stock number "72-R-307-112" ????
1954 - 1974 FSN (Federal stock number), 11-digit number
1974 - present NSN (National stock number), 13-digit number
Military procurement was done through the Defense Supply Agency 1962-1977 and all contracts had a DSA prefix. The dates were by fiscal year...July 1 through June 30. Fiscal year 1962 had a DSA 1 prefix and E-62 suffix. 1963 and 1964 were the same but substitute "63" or "64" in the suffix. Fiscal year 1965 will just have the DSA 1 prefix and no date code. Fiscal year 1966 will have a DSA 100 prefix and no date code. Starting in 1967 there will be a DSA 100 prefix plus a two digit date code. So, for example, fiscal year 1968 contracts will have a DSA 100-68 prefix.
Contract numbers
WW2 - 195? no prefix - Contract for U.S Marine Corps (BuSandA symbol, stamped in sleeve)
1946 - 195? "Supply Department of the United States Marine Corps" and date (stamped in sleeve)
1953 – 1961 DA (Defense Agency)
confirmed examples of contract numbers: 1957 – 1961 DA prefix on the tag
1962 – 1977 DSA (Defense Supply Agency)
confirmed examples of contract numbers: 1962 – 1977 DSA prefix on the tag
1978 – 1993 DLA (Defense Logistic Agency)
confirmed examples of contract numbers: 1978 – 1993 DLA prefix on the tag
1994 – 2003 SPO (System Program Offices)
confirmed examples of contract numbers: 1994 – present SPO prefix on the tag
Stock numbers
194? - 1954 example of stock number "72-R-307-112" ????
1954 - 1974 FSN (Federal stock number), 11-digit number
1974 - present NSN (National stock number), 13-digit number