Thanks to #DoréEnCasa, an initiative of the Spanish Film Library that allows access for a limited time to recently recovered and restored materials, for making this rarity available, if only for a limited time.
I've written a comprehensive article on the short film for bare•bones #2, which is now available.
I never expected to have the opportunity to see this without traveling to Spain. Very special thanks to David J. Schow for alerting me as to its availability!
