Numbered mini sheet of ten se-tenant stamps.
Siderúrgica de Orinoco C.A. (Sidor) is the largest Venezuelan steel corporation。 The company is situated in an industrial zone in Ciudad Guayana, Bolívar State, near the Orinoco River。 Founded in 1953 as a public company, it was privatised in 1997 under President Rafael Caldera, with a 60% stake going to Argentina's Ternium。 It was renationalised in mid-2008.
