IF you are looking for Seiko wathes, People's Park complex at Chinatown have a very wide range (there is one shop in the 3rd floor), but prices is not the best in People's Park and if you are a caucasian (which those watch sellers there reckon as foreingner make sure you know what you r buying. Prestige Watch in Bras Basah also have a good range of Seiko models, but I dun think you can get to see all the Japanese domestic models (i.e. Grand Seiko, Credor series,...) anywhere in Singapore.