Rollo, the fretboard sits on the body however the neck, while of different wood, extends the body in some sense.

I got a reply from Manodolin Brothers who, while not interested in the instrument, say it is likely a 1920's instrument. If it was in mint condition, which it isn't, and had the original case, which it doesn't, it would be worth about $300.00 (US I presume). They just call it a "skinny" type of no-name mandolin and refer to it as a novelty item.