Design enhancements were applied to the DH&D over its production lifetime. Note the application of a steel key guard cup protecting the winding square on this exhibited watch. The potance on this movement also is fastened differently than that on
serial # 1016 (can be seen, but requires explanation which is given in paper). From observed movements, the steel guard cup was applied to DH&D top plates beginning somewhere between serial numbers 1540 and 1718, and the method of fastening
the potance changed between serial numbers 2886 and 2929.
This example DH&D is housed in a BWCo hunting case with eagle hallmark numbered 4171 (highest numbered BWCo case author has seen to date). The dial with Roman numerals is not signed and has gold hands.
