The 7841 is the style number of the piece,,which many commercially produced items have !! The number on the bottom could be either,,year made,,number of the painter because many were paid by piecework so each one the person painted would have their number on it so they would be paid accordingly,, or a third possibility,, if you flip the piece over is that it could be initials LE rather than 37 !! A remote possibility but ,,,, still would be the initials of the painter !!! Personally I think it a year made !!