this is something odd, the seats in this Graham Paige are not the normal full width back seat, and two similar front seats. This is an ‘Opera Coupe’, fixed driver’s seat with a storage compartment behind it, a folding passenger seat and a 2/3rd rear seat for a lady in chic clothing.

Of the six LeBaron-style bodies built by Briggs, few had this configuration.

http://www.juricastricum.nl/index.php/te-koop/graham-paige-model-827-opera-coupe-1929/

thanks Doug!