The Gasherbrum Massif contains three eight-thousanders peak (Gasherbrum I 8'080 m, Broad Peak 8'051 m and Gasherbrum II 8'034 m). The Broad Peak, also known as K3 or Faichan Kangri, marks the Pakistan-China border.
They are the 10th, 11th and 12th highest mountain on earth.
First ascent of Broad Peak: 09.06.1957, Austrian team, Fritz Wintersteller, Marcus Schmuck, Kurt Diemberger, and Hermann Buhl.
Pakistan 1981, Peaks of the Karakorum
(The summit at the right (behind) seems to be the Gasherbrum I and the summit between Gasherbrum II and IV is Gasherbrum III.
The stamp was issued in the series "Mountains".
India 1988, Broad Peak,
The stamp was issued in the series "Himalayan Peaks".
Pakistan 2017, Broad Peak.
The stamp was issued in the series "International Year of Sustainable Tourism for Development".