Hey Juancho,
I see two different shells, which rings a bell about a thread we had about vintage LP bongos a while
ago. After a hard day of teaching I am too lazy to look for the thread, sorry.
What exactly do you want to know about this bongo set?
I have got a late 1970s LP bongó (two same shells though) which I call my miraculous set
They are very good bongos with decent skins in my opinion - BTW your skins look pretty good too.
Regards
Mike