Z1 is an obvious choice. However, certain things don't add up. Firstly, it looks as much like a Z1 as a Z3 does! Some technical details aren't right either, the size and position of the kidneys and lights is wrong. The door shut lines are wrong, the wheel arches are wrong, as are some of the air vents, the roll bar,.. etc etc.
It has a short number plate like it just says Z, or M or something on it, as if it were to be shown, so I also doubt it's wearing camo.
The heading IIRC on the website I found it on was "original M roadster".
I like researching these obscure things.