Info from Seibertron.
http://www.seibertron.com/news/view.php?id=5807
NEWS: eHOBBY have added a link to thier exclusive G1 coloured Galvatron reissue to explain his additional paint applications. It appears this is not the original G1 Galvatron but Galvatron II from the Marvel G1 comic books issue 67 to 79. It reads:
In an alternate universe in which Cybertron was destroyed and the Autobots exterminated, another Galvatron became the feared ruler of Earth. Sensing the existence of this powerful Decepticon from a parallel world, Unicron used his power to cross dimensions to summon Galvatron and bade him to make an advance strike on the enemy's strength. However, out of his bottomless pride and lust for conquest, this "Galvatron II" rebelled against his master, and after a rigorous struggle, he finally broke his chains of servitude. Now it seems nothing remains to keep his ambitions in check, save for his own madness. However, Fate may yet carry him off once more to be trifled with eternally as a tool of Unicron.
See the listing and infomation here at eHOBBY.co.jp
Source: eHOBBY