Any idea what this bike is? We received this bike from a friend that was cleaning out their garage.  There aren't any identifying badges or marks, etc., except the ID# H990320629.  We tired to find a similar frame as seen here. 

Any information would be greatly appreciated.
Its a Schwinn Lowrider with what looks to be 16" high-spoke count wheels.

It is not a limo lowrider or stingray lowrider, just a "lowrider"  The front springer fork (suspension) and high spoke count, and banana seat have been part of the design for a long time.

As for year - the model was available from the 1960s and is still available now.  Lack of front brake implies its not recent, or its from somewhere that a single brake is legal.

Note, the rearward seating position makes this a "semi crank-forward" bike, and it would be quite hard to ride up a decent grade because it would be tippy and light on the front wheel.