Marked with an F beside the Line Material Logo and then at bottom it has PATENT NO / 1709477. Seen a few of these heavy pieces but don't recall ever seeing more markings other than an F. Only damage is the small rust stain on the unglazed portion. No chips or ticks. Tiny glaze miss on middle ridge. Porcelain is 4 3/4 inches long by 3 inches wide.

More photos on request. Check or Money Order. Asking 15.00 Shipped in US. All others please request quote.