I found a strip of these stamps at the weekend and just loved the industrial graphic softened by the pink, violet and purple colour palate.
They're English stamps celebrating the 50th anniversary of the International Labour Organisation,
1919 - 1969."The ILO was founded in 1919, in the wake of a destructive war, to pursue a vision based on the premise that universal, lasting peace can be established only if it is based upon decent treatment of working people. The ILO became the first specialized agency of the UN in 1946".
In 1969, it's 50th anniversary year, the ILO also won the Nobel Peace Prize.