Here is a vintage magazine advertisement for The Everett Piano that was manufactured by The John Church Co., of Cincinnati, Ohio. The ad includes a fun illustration of Santa (taking a break from delivering toys) having a jolly time playing the piano while two surprised children peek in on him around the edge of an open door.
Here is a black and white clip art version of the illustration from the ad.
I scanned the original page from the December 1892 issue of St. Nicholas magazine.
Click on images to enlarge.