Vintage Hand Made & Painted Stoneware Coffee / Tea Trigger Mug Cup w/ Butterfly

Lovely hand painted unique piece. On either side of the butterfly are the numbers "77" & "27", not sure of the significance of these numbers. On the bottom is imprinted "bennington potters bennington vermont 1340 dg", the company is still in business and has been for nearly 75 years. There are two tiny chips on the lip but otherwise it's in great shape.