Registered cover group with historical significance, 1920-1940. Incredible accumulation of nearly 300 Registered covers from Chinese businesses in Western and Eastern cities. Mostly all addressed to Bock Toa Hong Co. or Wing Tai Lung Co. both in San Francisco. We speculate that cash was being sent via this registered mail. Many covers with Chinese markings and advertising corners. A significant and interesting holding, generally F.-V.F. Estimate  $1,500 - 2,000. $0