Karl Marx 2x 8 fen, Tsunyi Conference 3x 8 fen, Lu Shun 2x 8 fen, Labour Day 3x 8 fen and Thoughts of Chairman Mao 8 fen on back and front of registered airmail cover from Dairen 22-6-1967 to Haarlem (The Netherlands), fine/very fine (some wrinkles, one stamp missing corner perf.)