If you are just starting out one of the most important things to remember is DSA stands for – Defense Supply Agency and is seen before, during and after The Vietnam War. DSA – Defense Supply Agency (Early to Post War 1977) DLA – Defense Logistics Agency (1978 to early 90’s) I’ve tried to group the contract dates with a photo of a Nam era cover.
It’s always nice to see what an example looks like.
The Golden Helmet of Coțofenești is a Geto-Dacian helmet dating from the first half of the 4th century BC.
Although the shape of most fire helmets has changed little over the years, their composition has evolved from traditional leather to metals (including brass, nickel and aluminum), to composite helmets constructed of lightweight polymers and other plastics.
The leather helmet is an international symbol of firefighters dating to the early years of firefighting.
Typically, traditional leather helmets have a brass eagle adornment affixed to the helmet's top front of the helmet to secure a leather shield to the helmet front.
The test is then repeated on the same impact point to ensure the helmet can protect from multiple strikes (usually two strikes of equal force) to the same area.
DOT – An acronym for Department of Transport, DOT is the is US government approved standard and, in the United States, is the most popular.