Thanks Gents. Have no idea when last serviced, but I suspect a very, very, very long time past. Maybe even never. While the mainspring "feels" smooth when winding (no slipping, grinding, etc.), the spring will only accept about 10-half turns until resistance. In fact, the 10-half turns is probably consistent with the short run time. Don't most pockets take more than 10-half turn to load? So putting the watch into the hands of a proper watchsmith is probably best. No easy task in the piedmont of North Carolina. Anyone know of a reputable watchsmith that works via postal? Thanks.