Any independent watch service here. I wan try my luck at servicing my fathers vintage citizen xD
i serviced my vintage titoni (about 50yrs old) at bendemeer $160. The 'uncle' replaced my scratch glass, fixed the inside, new original crown and new clasp for the bracelet and waxed/ polish. apparently he specialized in titoni so he has the parts.
not sure about citizen..
k2 at tanjong katong complex specialize in seiko.