A gem of an alarm clock i could not resist

I just could not resist, we got it in Ireland from a chap that does clock repairs. He had a couple of alarm clocks and while I was waiting I kept picking it up and putting in back in the box eventually deciding to buy it. It is 2" * 2 " approx. and keeps perfect time. It came in its original box and seems to be a limited edition - assuming that Nr 37/170 means this.