doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com What model Francotte is this?

I recently acquired this lovely 12b Francotte, and I'm at a loss to figure out what model it is. This is my first Francotte, and I'm enamored with it. I inspected the internals and the machining and lock work is superb. No cracks in the wood either. I don't know a lot about them except that they are very high quality and were often made to order, as may be the case with this one. This little 27" beauty only weighs 5.13lbs with its sunken rib configuration. This is a non-ejector gun, so the closest I can come to it is a model 18? Any input is appreciated. Thanks-