Mutual Assurance Company. Philadelphia, Pennsylvania. Cast Iron. Reproduction Fire Mark of Bulau B38 (known as the Green Tree). Repainted. Reviewed by Auction Verification Committee in 2017. Determined to be a Reproduction. Reasons: Lots of Grinding with Pieces of Iron on Edge. Red Rust on Front. Uneven Thickness. Old Casting Circle of Reverse. At the Small Measurement of this Issue. Older Mark but not Authentic.