Simplex Means Simplicity The Simplex Player Action (PIANO)
by: Simplex

Softcover. Wochester MA, Simplex Player Action Company, reprint, Book: Very Good, Dust Jacket: None, Softcover booklet, undated, but appears to be a reprint from about 1940. Instructions for a device that used to help tune and repair pianos. 40 pages, b&w illustrations. Light wear to wrapper otherwise clean.