I think it likely that the watch was produced for a company who had their name added to the crystal by request, maybe as an employee or corporate gift, I 'googled' Armstrong and it came up with a flooring, cabinet and ceiling manufacturer ( http://www.armstrong.com/ ) which has the same logo/name as that that is printed on the crystal.
The watch itself is a Hamilton QED II, Abe & Piotr have information on this watch on their sites at http://www.timetrafficker.com/watches/l ... index.html and http://www.crazywatches.pl/hamilton-qed ... 2-led-1975 respectively.
Very nice watch and great photo's, is the watch by any chance engraved on the back, 25 years service or the like?