The earliest bow attributed to him, however, according to Raffin & Millant, was made for Jean Baptiste Vuillaume, and dates only to 1845 when he was thirty-seven years old.
On the other hand, the classic, bell-shaped Simon head is derived from an earlier Tourte model.
The finest Simon bows have a highly attractive, lithe flexibility and a genuine beauty of tone.
His best bows are strong, finely balanced sticks which produce a smooth and velvety tone.
[citation needed] The chamfer of a Simon bow follows a large, generous curve which can be seen from the profile.