Longaberger Pottery Blue Woven Traditions Pie Plate Rare Unglazed Signed Measures about 10" across Longaberger Pottery Pie Plate with Unglazed Bottom 1990 Blue Woven Traditions Retired/Discontinued 1990 signed Vitrified china and is oven, microwave, freezer and dishwasher safe The signed and dated aspect of this pottery made it difficult to produce to meet the demand and it was not long before the company had to omit the signature and date and go to a gully glazed bottom without signatures...making this so VERY Collectible!