Check this cool old advertisment for Aluminized
CRT's, the seller posted the whole thing!

Notice the TV repairman wears a suit and tie :rolleyes:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2178295465&category=3638

Actually, A jacket with the company logo and tie! When I started out in '77 my boss made all the road techs wear a company jacket and shirt with the Zenith logo, No tie though!
We used to drive '72 Econoline vans and had to keep a daily parts inventory for them too.