Serie Pioneros

Spanish reissue series from the late 70s, for classical pop rock albums from the 60s.
2 batches of 10 albums each were released, the first in 1977 and the second in 1978, all of them with the original artwork modified with the serie label on one of the corners.
The albums included an insert with pictures and description of the 10 albums of the batch and a corner to be filled with the owner data to be cut and mailed to claim the promo: "Buy 4 albums of the Serie Pioneros and receive one for free"

A Promo Only album was released too with the 1978 batch, the cover was a reproduction of the insert included with the albums of the series but printed over cardboard.