If your budget is a bit more, and you want to hear a massive clunk every 30 seconds rather than a soft tick and you want to drive 2' (60cm) hands, then you might want this: https://waitingtrain.blogspot.com/2015/05/a-large-gents-turr...

The smaller ones look the same but are less beefy.

I used one to make this clock:

https://www.secretbatcave.co.uk/projects/electromechanical-c...

Which instead of using a well disciplined time source, uses a tuning fork and 74xx logic to drive it