This custom-designed model differs in many respects from the following production watches produced by the BWCo. It is oversize, approximately 22 size (49.5mm), to accommodate two large main spring barrels as well as an extra set of wheel and pinion to run them. It is geared to run at 14,400 beats per hour and is probably fitted with stop work barrels. The jewel settings are secured with two screws as opposed to three on the 30-hour watches; the center wheel is jeweled on the top plate. The hairspring is undersprung with a solid balance like the later production models, presumably to reduce costs, whereas the original 8-day model was oversprung with an expansion balance. This movement has a gold balance. It is key set from the front. It is housed in an 18K F.D.&Co. hunting case with matching number 3.
