Advert of The Sincere Co. 1907

Advert found in

THE DIRECTORY & CHRONICLE FOR CHINA, JAPAN, COREA, INDO-CHINA, STRAITS SETTLEMENTS, MALAY STATES, SIAM, NETHERLANDS INDIA, BORNEO, THE PHILIPPINES, &c. WITH WHICH ARE INCORPORATED "THE CHINA DIRECTORY" AND "THE HONGKONG DIRECTORY AND HONG LIST FOR THE FAR EAST" FOR THE YEAR 1907

The entry for Sincere appears first in 1907, not before. Probably they opened this year.