Toronto. Years ago it was common practice to rebrand products from national factories for sale in large chain stores. Sears was no exception. Its line of cameras were branded “Tower” but actually made by mainstream companies in Europe and Japan with slight modifications to the originator’s other models.
It was common practice as well to use leaf shutters and a removable front element to adjust a better quality camera’s focal length. Steinheil, now long disappeared, made excellent quality photographic lenses last century.