Hornady / Pacific is probably a DL 155. Very nice loader from the day.
There were a lot of very nice loaders from back in the day, but finding parts for them today can be a challenge. Have never used or even seen a 155, so would want to know more about shot and powder bushings. One of the few wear items is the wad guide fingers. If that press uses same as modern Hornady presses and shot and powder bushings available, it is a very good single stage loader. Other things to look for are 6 and 8 point crimp starters and due to the way most were built, the spring loaded cup used to install primers are often missing, and may be tough to source.
The way I remember it, MEC was not the best loader you could buy from back in the day, but they survived, they load a very nice shell.....and you can still get parts for them. Can't say that about most of the others.