The flag pin on the left is from the Beijing Workers Representative Union. On the bottom it says, 为人名服务 “Service to the people.” Year: 1967. Dimensions: 1″ x 1″ (2.5 cm x 2.5 cm). Place of origin: Beijing.
The brass pin in the middle is imprinted with the characters, 毛主席万岁 “Long live Chairman Mao” on the back. Year: Unknown. Dimensions: 0.75” (1.9 cm) diameter. Place of origin: Beijing.
The plate 5-star pin on the right has the characters, 毛主席万岁 “Long live Chairman Mao” below the silhouette of Mao. Year: 1967. Dimensions: 1.25″ x 1.25″ (3.18 cm x 3.18 cm).