This figure always makes me sad, showed what mad barbarians was capable of when they moved away from all the Kid Robot stuff. Wish they would have continued on with more stuff like this. Well at least we have this toy.
Both great guesses, but in truth I think it's a bit of a mystery. It's called Pegyaos, a very early pachi. There doesn't seem to be any concrete evidence behind it being Miura even though it's usually attributed to them. Also no indication as to why it shares some similarities with early Marusan (honestly I think everyone was just cribbing off each other). I'm sure the truth is out there...
If anyone would know, it's Mulder ... but whoever made it, they knew what they were doing. Great toy!
The head looks like Ganburiya: https://ekizo.mandarake.co.jp/auction/item/itemInfoEn.html?index=288303