To revive a long-dead thread

I found a clarissa,sold for 150 euros.The owner says it cost 500 some years back.He insists it's an "electro-classical" not an "electro-acoustic" guitar.
It's a bowl back synthetic,ovation-style guitar,white with yellow fading out from the outline(sunburst?),dual holes near the neck decorated with a wing-like-shape that extends to the bridge,with truss-rod and the letters "CL" on the headstock.Pretty much like an ovation,but prettier.
It looks like the one sold here: http://i.ebayimg.com/00/s/NDg5WDEwMjQ=/z/OLIAAOSwEK9T~OyC/$_86.JPG but in yellow instead of blue and 3 times more expensive.

On the inside it reads CLARISSA ARG-ORO P-420-EL ,says the owner.

The last part seems ok as a serial,simular to http://mudcat.org/thread.cfm?threadid=79124#2409475 's guitar
but without the "olverini brothers" logo.

I'm really looking fw to joining the "Clarissa cult".
Anyone knows anything about the "ARG-ORO" serial?