Trade Card: Eckstein Brush Co., Philadelphia, Pennsylvania This trade card, one of two in the record, advertises the Eckstein Brush Co., located at 412 Arch Street in Philadelphia, Pennsylvania. The front of the card features a charming illustration of two children watching a turtle seemingly dance. The style of the illustration is whimsical and child-like. The text 'ECKSTEIN BRUSH CO., NO. 412 ARCH STREET' is prominently displayed on the card. The back of the card is blank.