After the Alfa P2 won the first world Motor Racing Championship the badge was surrounded by a laurel wreath in respousse metalwork.
Circle diameter rose from 65 to 75 mm.
In 1930 the diameter
of the circle was reduced to 60 mm and remained unchanged until 1945.
When the Italian monarchy was abolished and the country became a republic, the Savoy dynasty bows were exchanged for two wavy lines and the badge diameter was reduced to 54 mm.
In 1950 a new
badge in enamelled brass but with the same diameter was introduced. In 1960 the same badge design began to be made of plastic.