Slightly Marked 5 in Pan

Hi there,

Looking for info on an unmarked pan. Clearly old continuous heat ring, thin casting nice smooth cook surface. Has a 5 on the top of the handle. Nice strong font. It has an X on the underside of the handle.

Please see the guidelines at top of: http://www.castironcollector.com/forum/showthread.php?t=78 for the type of photos needed for best ID.