A marketplace filtering verified clockmakers by the specific mechanism types they're actually experienced repairing, rather than a generic "clock repair" category, would connect an owner with someone who's handled that exact kind of movement before instead of a shop that will take the job and then struggle with unfamiliar parts. Money is a referral fee per completed repair booking. Given how small and aging this specialist population genuinely is, I'd research the realistic supply side carefully before building this, since the whole value proposition depends on there being enough verified specialists in enough regions to make the directory actually useful rather than mostly empty.