Some remarks:
Before the production of the Marden Espace started in late 1979, it went through various prototype stages.
The puzzle picture was taken in 1976 at the Geneva salon. I wouldn't be too sure whether it is the electric Espace 1, as you can see the Sachs rotary engine of the Espace 2 in front of the car. This March 1976 version differs from the 1975 ones (and from the Paris salon version from autumn 1976).
Your last set of pictures shows the first prototype from 1975. As far as I recall, that one really had an electric engine.
The colour picture shows a Marden Espace from around 1980 when series production had started. No electric or rotary engine anymore, but a 49 cc Sachs two-stroke engine.
And I think the "Mrs" Marson is just a misleading plural of "Mr".
