In the late 1950's, Blasco Industries of Spain produced small 1/87 plastic models under the EKO name. These were mainly intended to be used in HO scale train set scenery. These 1959 Thunderbirds were produced by EKO well into the 1970's. The EKO company is still producing miniatures for the model railroad hobby.
Bottom view shows this EKO 1959 Thunderbird model is issued under the number 2044 .
Above photos are from the model collection of Zargon Quadratvogel.
Note relative size of models to US quarter. They are about two inches long
Above photo by Gary Kerr