Eterna Super-Kontiki 130 PTX CASE BACK (consider poor case, watch, if case back is good)

I am seeking a second generation Eterna-matic Super-KonTiki 130 PTX case back, preferably just case back. However, if you have a poor example (even munted) Super-KonTiki watch with a good, clear case back please let me know me.

Thank you.