There were several choices of "High Standard" manufacturing sources: Hamden, East Hartford, Houston Texas.
Hamden guns are the originals that collectors love. These are the guns that made Hi Std famous for accuracy. The Supermatic series started in the 1950's, progressed through at least 10 versions over time. The star models were Trophy and Victor.
East Hartford was the site of Hi Std when they moved in an attempt to down size. Collectors don't like them but they shoot as well as Hamden guns, have a bit lesser shine, but are lower priced on the used market. The bargain from this factory site is the ML series in either the Trophy or Victor designs. They also sold a premier version, the 10-X, which is famous for its shooting ability.
Houston Texas was the official re-birth of Hi Std name in the 1980's. There was some stumbling initially but they eventually got them sorted out such that they shoot as well as Hamden guns. They too had their stars as the Trophy and Victor. The late ones were stainless steel frames and are the best of this bunch. Their super star is the re-birth of the 10-X model, a hand built gun of select parts. This model was also available from the last days of East Hartford Hi Std. They closed their doors in bankruptcy recently.
The former head of Houston Texas Hi Std now owns Interarms Texas and provides service and parts for the guns. That is Alan Aronstein. He is involved in an effort to provide the design in a different named gun. I don't know where he is at in that endeavor at this point in time but a inquiry to interarmstx.com could possibly get an update from Alan.
Finally there were two un-official clones of the Hi Std guns: Stoegers and Mitchell. A lawsuit removed them from the market place many years ago. I hear good and mostly bad about them and they loose their value quickly because they are just copies.
This is just a brief overview from my perspective. Others here might fill in more details.
LDBennett