Alto.. Seal, Image & Found by Lee

Alto.. Seal, Image & Found by Lee
Found in Stirlingshire, 18mm.

Inscription around ...ALTO .. ..... // GO(E?)..D / M..N...

Philippe Lanez has suggested Rio Alto and GOLD which is an excellent suggestion but I can't seem to find out much about Rio Alto before 2006 which seems to late for this seal ???

Photo info