Just came across this 12 size Waltham/Howard with a number of unusual features and was hoping for some productive comments. It's 19 jewels, steel escape wheel, gold center wheel, double roller. The serial number is 1030121. Parallel bar damaskeening except on the train bridge, where there is a semi-circular section milled out, with 'E Howard Co. Boston" engraved. Note that there is no provision for the usual whiplash regulator. Each component carries the s/n 630121, except the balance which is 1034121. 'Howard" has been ground off of the dial, except the H! The case is what seems to be the original Cresent 25 year GF - exactly like the later Howards, but without the company logo on the dust cover. Questions - why the mis-matched serial numbers? Why the milled-out area on the train bridge? Why a plain regulator? How many of these were made for Keystone? Insight is appreciated!