Los Relampagos (The Lightning) was a popular instrumental group in Spain during the 1960s. They specialized in pop arrangements of classical and traditional Spanish songs and were influenced by bands like Johnny & the Hurricanes and The Shadows.
The Dos Cruces (Two Crosses) single dates from 1965. The lead guitarist is obviously a fan of The Shadows' Hank Marvin.
There are several albums by Los Relampagos available on CD or as downloads from several sources. Most concentrate on the group's popular recordings from the '60s and almost always include Dos Cruces. The quality of the recordings probably varies widely, so sample before buying if possible.
Los Relampagos continued recording regularly into the 1970s and there have been occasional reunions since then. The date isn't readily apparent but this performance of Dos Cruces on a TV show appears to have occurred well after the peak of their popularity. Audio quality is good, video less so.