scooter_trasher
Finally riding a big boys bike
[I would only trust the information from the original source, as copies (especially unauthorized ones) can introduce errors. For example the ORIGINAL 1970 through 1982 page it states: "NUMBERS ARE NOW LOCATED ON THE LOWER LEFT OF THE HEADTUBE (By The Schwinn Badge On The Front OF The Frame)", whereas on the COPIED 1970 through 1982 page it states "Serial #'s are now on the lower left of the headtube, by the Schinn badge on fromt of the frame".
Or in the case of my 75 Typhoon where everyone is wrong, it is stamped upside down and backwards at the top of the headtube, must have been hung on the line wrong and stamped as hung, because no one stops a production line and keeps their job, unless maybe it's ripping someones arm off.