During WWII, Steinway & Sons produced special pianos for the Allied Armies. Called G.I. Pianos or Victory Verticals, they were small, light and could be dropped by parachute to troops in the field.
Photo 1: Demonstration by Special Service Unit, Fort Meade MD. Jan. 4th 1943
Photo 2: William Kuehl of the 10th Special Service Co. Tuning one of the GI pianos in the music repair shop on Guadalcanal.
Images from San Diego Air & Space Museum Archives’ Flickr page.