Scorpio Pendant

Hi Y’all
My best friend had this made for me about 40 years ago. At the time we lived In Newport Beach, Ca. She’s passed on so I can’t ask her about it and if she told me who made this I don’t remember. I think it was made in the lost wax method. It is so incredibly detailed, even the little stinger sticks up.

There are a lot of lines on the back and maybe a name. I thought it might be a star chart or something. If anyone knows anything about this I’d love to hear about it.