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Cycle clearly a Cesare Rizzato product.
Best known Rizzato badge is Atala.
There are also a number of others such as Atlantica, Lygie, Maino, Corso, Rizzato, etc.
The 21 marking on the bottom bracket shell is the frame's nominal size in inches. You will find it to measure 54cm c-t-t-.
Lug pattern is Agrati "BRIANZA." The bulge-formed head typically indicates a low end model.
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