I have a few issues of the original comic book. Several were "Serie Gigante" (jumbo sized, like a big magazine), others were more or less regular size. Curiously, the big ones and regular ones were all priced at one peso, probably due to the colour artwork inside. Mexican comics of the Fifties with b&w or sepia-toned interiors seem to have been priced around 50 centavos (I've seen some that cost less, and over the decade the price gradually crept up).
Link to the book:
The Green Spider 1 (translated)