Jan Calleja picks up where he last left off with VOLTES V and MAZINGER in his line of retro robot customs, with the classic UFO-G! (Also known as "UFO-Robo" or "Grendizer" - refer below) No doubt a commissioned piece, you can also check out his detailed work-in-progress album for the build on Facebook!
"UFO Robot Grendizer (UFOロボ·グレンダイザー UFO Robo Gurendaizā?, sometimes romanized as UFO Robo Grendizer) is a super robot TV anime and manga created by manga artist Go Nagai. It is the third entry in the Mazinger trilogy. It was broadcasted on Japanese television from October 5, 1975, to February 27, 1977, and lasted 74 episodes. The robot's first appearance in the United States was as a part of the Shogun Warriors line of super robot toys imported in the late 1970s by Mattel, then in Jim Terry's Force Five series, both under the title Grandizer." [Wiki]