Crestworth Astro with unusual green wax. This is the only one I've found. It was in a terrible condition when I bought it, and I really struggled to restore the contents. I very nearly gave up at one point! The master fluid is a replacement. The original was very cloudy but appeared to be yellow. I preferred green.
The wax isn't fluorescent like the Mathmos green, it's a much softer and cooler shade of green.