The older movie films didn't always have the type on them. 28 is probably the slit number of the master roll. There are probably some additional markings that are just symbols, but they can be decoded into the year of manufacture via charts like this:

http://www.film-center.com/dates.html

The only red films I've seen are reversal films like 5360/2360 and SO-291. Those are not only incredibly slow (ISO 0.25 or so?) but you have to develop the living crap out of them. My latest attempts were with ID-11 stock solution for 13 minutes, which came out OK. So your film may not be fogged, just underdeveloped.

Duncan