Thanks for your assistance chaps. I’ve come close to a match with some of the suggestions, but not exact. I’m no coatings expert but I’m guessing the original paint will have faded over the last 36 years, (or does some paint darken…)
Yellow seems such a random choice for a machine produced by the GDR, you normally associate that place with somber and drab colours. They were aiming to sell to the west, but yellow?!
Anyhow, I digress.
Thanks again. If I find a match I’ll post the results.