Can't speak to their 45 mm range but I believe they are the company that kept alive the Jack Scruby range of miniatures. For those who don't know, Jack Scruby is the man who really gave us the modern hobby - and so acknowledged by Donald Featherstone even though the two of them decided to part company (though Jack was in California and Don in England) as far as co-editing that early magazine (Don, of course, went on to write many books for the early hobby and Jack went on to invent other scales, etc (He may have started both 15 mm and 25 mm though that may have been Minifigs).
Neither miniatures nor historical miniatures nor gaming with historical miniatures began with Mr. Scruby but he probably hosted the first convention, created the first real line of affordable miniatures aimed at historical miniatures gaming, and published a magazine that in a very direct way lead to the hobby we have today; apparently many of the original subscribers (The Old Guard) went on to become stalwarts of the 'first generation' of the modern hobby.
While I was there many years after he'd passed away (1988 I think and I was there around 2000), I just missed getting to pick up figures in his shop in Cambria - his family had just sold on the figure range and I'm pretty sure it was to HIstorifigs. Missed it by maybe a month or so.