I recently picked up a Mountainsmith lumbar pack on ebay. Its in good shape (not great) but I got it for a steal. What I am wondering is did I get the Tour or Day pack? Is there any way to tell; I don't see any identifying markers and they are relatively the same except for volume. It seems rather large for a lumbar pack (which is fine i bought it for day hikes).

Either way; I can put up pics if needed, gonna wash it first. Is there any way to tell w/o???