Made by SH Horikawa early 1960's. The rare to find silver Attacking Martian. All metal apart from green plastic inserts in chest. 3 versions available, the regular and fairly easy to find brown version, although the early brown versions with metal battery compartment and thicker hands are difficult to find in mint condition, also the golden version which is almost the rarest, also having metal or plastic battery compartments. The most rare being the lighted eye version with rare box which has artwork showing light rays shining out from the fly eyes.