GJS-500-7 also called GGG50 marks a strong and heat-resistant type of metal while GJS is a sign for Continuously Cast Spheroidal Graphite Iron - which describes a process in which the metal is continuously fed.
Servicios Publicos Sociedad del Estado - is the company responsible for water, sewage and electricity in the Santa Cruz region.
SERVICIOS PUBLICOS SOCIEDAD DEL ESTADO - PUBLIC SERVICES STATE SOCIETY
The lid is similar to another lid that has the manufacturer’s name on it