The "Golden stickers" with the names of EMC models appeared in 1986 from the serial number ~Z7700 (this is why the frames in the 1986 catalogue do not have any "golden stickers" yet, and the frames in the 1987 catalogue have them); the only exception was the 3-Athlete model, which was first given these stickers in 1984.
At that time the Criterium model appeared, the Pro model turned into the Corsa Extra with this magic trick, and finally the Corsa model was marked (produced since 1985).
Professional (who never was - officially) never got any gold sticker, and ~2 months later he went down in history...
Frame details (most of them available on request) have nothing to do with it...
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