After wandering around HK the last couple of days Vintage Concept and Kenīs Watches had the best selection, especially the shops in WanChai area (Fleming Rd and Lockhart Rd, but they both have shops in Central district as well).
I ended up buying from NbTimes in person.
Champagne court shops like Union Watch on Kimberly Rd didnīt have a large selection vintage right now but a lot of modern Rolex and Panerai
PakLee and Holiday Inn Hotel basement could be checked out also.
Iīd say prices are a bit steep for vintage in HK, large selection but not cheap.