diamond and number indicates year 1973-1979,
Circle indicates year 1980-1984
Box with 11 =1985
Box with 22 = 1986
Box with 33 = 1987
The box dating system is more or less what I believe but I could be not 100 percent right.
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1 Super Record bike, 1 Nuovo Record bike, 1 Pista, 1 Road, 1 Cyclocross/Allrounder, 1 MTB, 1 Touring, 1 Fixed gear