I too have been to the Enco factory/headquarters on W. Bloomingdale in Chicago to buy stuff. I recall the owner and his son were Nathan and Charles Usiskin. I saw an obituary for the son dated June 20, 1996, so I guess MSC bought Enco after that. Enco made bed turrets, four-way tool post turrets and quick change tool posts in their factory, and they were good products. They also ran a second mail/phone order tool business called Colex out of the same building. I think the Colex name came from their invitation to call them collect, back before 800 numbers became common.
Enco had their name put on many imported products. My Enco 40 position quick change tool post was made in Switzerland. My Enco boring and facing head, bought new around 1975, was made in France. I picked up another size Enco head on eBay that looked the same, but it is made in India, probably more recently. Then there was all the Taiwan stuff of mediocre quality.
Larry