Thank you for your patience.
Officine Turckheimer Automobili e Velocipedi were active from 1905 till 1908.
1st model was ready late 1904, and was a small single 4 hp.
There was a biger 18/24 hp four in 1906 and the last model was a twin 8/10 hp Junior around 1908.
This one should be the single cilinder called Tipo Unico 5 1/2 hp from 1905.