Would contacting Lebeau and getting pictured provenance as in this Lebeau help with determining the actual value? Also noticed that the serial number on the gun below is 42898. That gun possibly dating 1926, my gun is serial 42307 and possibly dating 1932?

http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=248458&page=all