vintage action figure of Jan Kugo (also known as the hero from the Japanese anime series SF Saiyuki Starzinger, or Spaceketeers in some Western markets). The text "SIR JO CO" on the figure's waist likely refers to its manufacturer or distributor, possibly a vintage toy company.

This is what I found when I Google searched it. Not sure if it’s the exact one, but please let me know. Looks incomplete and not too bad for condition. See pictures for reference. Feel free to ask any questions or for extra pictures. Thank you.