I found an old Pocket Watch case which I hope to use with this movement. The case is marked Dennison Watch Case, with the stamps of ALD (Aaron Lufkin Dennison), the hallmark of the lion passant (.925 purity), the Anchor (Birmingham), letter h (1907), and the case number 2776. So the case is a Waltham Pocket Watch model size, it will need a replacement button and crystal.