After nine years in exile due to the Spanish Civil War and the Second World War, Aurelio de Arteche y Arana (1908–1983) returned to Bilbao, his hometown, in 1946 to accomplish his main life objective: creating a company like Usines Balteau, S.A., a company he knew during his exile in Belgium.

Thanks to help from friends, family and Marcel Balteau, Aurelio founded EAHSA, Electrotecnica Arteche Hermanos, S.A., in December 1946.

EAHSA manufactured Balteau's Instrument Transformers for the Spanish and Portuguese markets.
After nine years in exile due to the Spanish Civil War and the Second World War, Aurelio de Arteche y Arana (1908–1983) returned to Bilbao, his hometown, in 1946 to accomplish his main life objective: creating a company like Usines Balteau, S.A., a company he knew during his exile in Belgium.
Thanks to help from friends, family and Marcel Balteau, Aurelio founded EAHSA, Electrotecnica Arteche Hermanos, S.A., in December 1946.
EAHSA manufactured Balteau's Instrument Transformers for the Spanish and Portuguese markets.
Arteche Group