1920s-1930s vintage style Kwong Sang Hong Calendar Poster letter set. Kwong Sang Hong is a well-known cosmetic brand in Hong Kong since the early 1900s. The design of these red pockets is based on the company's posters from the 1920s to the 1930s. Set contains: 6 envelopes, 12 letterheads and 6 stickers. Brand new. Well-kept and stored. I bought these red pockets in 1997 in Hong Kong.