Protar 1:9 - Model motorcycle - Grand Prix 250 cc Mod. 106

This is a vintage modeling kit from Protar (historic brand founded by Tarquinio Provini) in 1:9 scale, which reproduces the FB Mondial 250 cc single-cylinder Grand Prix racing motorcycle.
Here are the main details of the model shown on the box:
Subject: The FB Mondial 250cc motorcycle, famous for its successes in the Grand Prix World Championship in the 1950s.
Kit features: The box states that it consists of 135 pieces to assemble.
Design: The model features the characteristic blue and silver "bell-shaped" fairing, used to improve aerodynamics during the Grand Prix competitions of the era.