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They must be overseas frames but came in chrome so are supergooses. UPDATE: it seems that some time around 79-80 and later, some supergooses were made, but not in chatsworth. supergoose came in chrome only, the teams were nickel plated with either a blue or red coating. If it starts with: TC, this means its a team or supergoose. Mid 1981 to early 1982 they started using the stepdown dropout with the 2 holes machined in it, thus, the birth of the "super" dropout. Late 1977 to mid 1979 they added the brake bridge but lost the coaster mount.
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back then the serials were sometimes only 4 numbers, so looking at the frame was the only way to id the year. 1975 to late 1977 the frames have no brake bridge, and had the coaster brake mount welded on.
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