X-400 SPACE EXPLORER VARIANT - REAMSA - SPAIN
The Boletin Oficial de la Propriedad Industrial details the Spanish version of the X-400. Box? Details.
This would appear to be identical the French Plastimar Mystere version: it lacks the vertical fins at the rear.
I0025060 (01.05.1956) Aeronave Futurista de Juguete