1.5" from a small series marked on the metal back with name of maker W.H. Haskell of St. Louis. Reverse has tiny .25" line where the cello is just a little separated from the metal back and this creates just the tiniest bump on the right rim edge when the piece is viewed from the front but hardly perceptible and the button displays gorgeously with incredible detail of large exhibition buildings surrounding a large water area and walkways at the center. Cello surface is somewhat flat and this appears to be as made. Rare and Extremely Fine.