https://velobase.com/ViewComponent.aspx?ID=53de54cb-5092-4340-bc31-3d00c4ddf6b9&Enum=113
Mid range derailleur shared across Triomphe/Victory and various MTB groups. Nowt special.
Croce and above had the nutted clamp bolt, not an Allen bolt.To judge by the finish, could also be Croce d'Aune:
https://velobase.com/ViewComponent.aspx?ID=9D0B4622-A257-430E-8D66-3B98CB350983&Enum=113&AbsPos=21