Here is my list of Wadsworth watch case serial numbers. the year is associated to the watch in the case.

Wadsworth Gold 6411323 1922
Wadsworth Nickel 1922
Wadsworth HC Gold filled 1578197 1907
Wadsworth 14K gold 7114207 1925
Wadsworth Gold 5851816 1922
Wadsworth Gold 6424082 1923
Wadsworth 10 side14K W Gold 7871677 1928
Wadsworth Gold 1925