AYUNTAMIENTO DE CORDOBA - CITY COUNCIL OF CORDOBA ALUMBRADO PUBLICO - STREET LIGHTING
GS - Spheroidal graphite cast iron - a special cast iron in which the crystallization of carbon has been slowed down, which makes it close to steel - also called ductile iron (Thanks to Vuori Susi for the clarification)
The lid is similar to other manhole covers made by the same manufacturer, for example
and other manhole covers intended for the same consumer, for example