Great. I find this stuff fascinating, but don't feel the need to own it.
What I like is it opens up new areas to think about.
As for other work they did, I don't know, but you might find similar ads in other trade oriented magzines. I'd look in Jan - March issues. With the ad clippers on eBay maybe this is a one time attempt?
Also this ad says modern factory. When was the factory built? Maybe they built the factory oversized so they could grow into it, and were trying to cover the excess capacity?
Neat stuff.