2.25". Tin-covered reverse with bar pin. Curl reads "The Henderson-Ames Co. Kalamazoo Mich. Employees Seventh Annual Picnic, Gull Lake Mich. July 30 '10." Depicts underwater frogs "Making Out" as they sit on clam shell with the clam peeking from open shell edge up at them. Smiling fish in right bkg. Moderate age tone and tiny spots on perimeter. Reverse has .25" hairline cello split by the collet but hardly shows and cello lays flat. Rare and first we've seen.