Here is a mid-century ad for Baldwin Organs showing a kid and his piano teacher. The item advertised is not an organ, but a small piano called a petite Acrosonic.
“An Acrosonic piano is an enduring and rewarding investment in your child and in music.”
Mid-Century Page 
Here is a mid-century ad for Baldwin Organs showing a kid and his piano teacher. The item advertised is not an organ, but a small piano called a petite Acrosonic.
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