The British Trade Dollar was designed by George William De Saulles and minted from 1895 for Hong Kong and the Straits Settlements. But after the Straits dollar was introduced to the Straits Settlements in 1903, it became exclusively a Hong Kong coin produced until 1935. Those with the mint mark "B" were produced at the Bombay Mint; others, marked "C", were struck in Calcutta. Those with no mint mark were produced in London. The mint mark "C" can be found in the ground between the left foot of Britannia and the base of the shield, while the mint mark "B" is located in the center prong of the trident. The 1921-B dollar was struck but never released for circulation, and only a limited number of 1934-B and 1935-B coins were released.