I’ve seen so many of these clocks at antique stores, estate sales and such with with IBM plaques on them with someone’s name. Apparently IBM used to gift these to employees for 25 years of service or something to that effect. Given the cost and the potential longevity of the clocks it’s quite a statement for a loyalty gift.
Incidentally, if you want an interesting pre-Atmos model, look up the Beverly Clock. It's been running since 1864 and was built in somewhere that would have been jungle-like bush a few years earlier given that New Zealand was barely settled at the time, it's older than the institution that houses it.