For your consideration, here is a Vintage Metal Reflective House Number Sign 1, 6 or 9, white with yellow outline on shiny black back.  It has 1 on one side and a 6 or 9 on the reverse side.  It measures 3 1/2 inches tall by 2 3/8 inches wide.  It is new old stock, but does have some light scratches on it. 

It will be mailed in a bubble mailer with foam core stiffeners.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (637.9a29b-.4bx2)