In 1997, Japanese manufacturer Bandai started the Soul of Chogokin toy line. It focuses mainly on super robots (mecha) taken from various Japanese anime series of the 1970s & 1980s.
Chogokin is Japanese for 'super Alloy' and is a fictitious material which first appeared in Go Nagai's Mazinger Z comic. It was later adopted by the Popy Toy company in 1972 as the name of a new line of die-cast metal robot and character toys sold in Japan. The very first of these toys was the 'GA-01' Mazinger Z, which in spite of questionable engineering that led Popy to offer a free replacement campaign, ignited a craze that changed the face of the Japanese toy industry in the 1970s. Bandai -the parent company of Popy Toy- continues the Chogokin line to this day, branded under their own name.
What's it worth? Take a look at this Soul Of Chogokin price guide: sold listings for a value indication.