A stamp booklet to be used in Hong Kong and on the companies was introduced on 1st January, 1904 and right up until 31st December, 1910 gross sales with the businesses ended up coupled with product sales in Hong Kong https://siobhannvku365350.theblogfairy.com/29614790/5-tips-about-booklet-printing-hong-kong-you-can-use-today