From a series of plastic model kits produced by Imai, called Megaro
Zamac. There was never an anime show related to this series, I think
Imai simply produced the kits to cash in on the giant robot model craze.
This is one of the hero mecha, the Va-Gal, I stuck fairly closely to the
original design but added a lot of extra detail since the models were
fairly primitive compared to more recent anime mecha kits. As well as the
actual model kit I had two reference images for this mecha, the model box
art and a promotional leaflet that came with the kit, as there were
several differences between the two images I decided to build both
versions, this version takes its colouring and details from the box art.