The backstamp dates this piece as 1936 to 1965. The company quit making items in 1965. Wedgwood & CO. is worth very little, as it isn't actually Wedgwood. Wedgwood & CO was created by Enoch Wedgwood, a distant relative of Josiah Wedgwood. This was a brand created to profit off of Josiah Wedgwood's brand, as his items were getting very popular. The below link should help clear this up:
Re: Wedgwood & Co. serving dish - purple & yellow
The backstamp dates this piece as 1936 to 1965. The company quit making items in 1965. Wedgwood & CO. is worth very little, as it isn't actually Wedgwood. Wedgwood & CO was created by Enoch Wedgwood, a distant relative of Josiah Wedgwood. This was a brand created to profit off of Josiah Wedgwood's brand, as his items were getting very popular. The below link should help clear this up:
http://www.thepotteries.org/allpotters/confused.htm