Years ago got huge round gold case with model 57 Waltham 778659 in it. Looks new and I believe all original although dial is marked American Watch Company and movement Waltham Watch Co. Lever set and stem wind with let down screw. So I know the movement fairly well, but know little about the fine case. BWCCo means Boston watch case co. Case also marked Waltham warranted 14k. Maybe part of American Watch Co. history? Did WWCCo. exist at same time?