Silvercreek,

If you followed my thread about the 1975 Sports Tourer I recently bought off VT-CL, one of the mysteries which came to light is that different model year Sports Tourers and Superiors, wore the same letter code in their serial number, "GJ" or July 1973.

mkeller has a "GJ" 1977 Superior. reggieob has a '75 Sports Tourer with a "GJ." mparker also had a "GJ" in a '73 color.

So I echo what dddd states above, "back in the day" Schwinn was not very concerned about what we might be curious about in the early 21st Century!