The Singer Manufacturing Company.
Instructions for installing and adjusting Singer electric transmitters series 46 and 47, form 20248.
R651886. Instructions for installing and adjusting Singer electric transmitters series 46 and 47, form 20248. By The Singer Manufacturing Company. NM: new illus. & text. © 10Jan49; AA106075. The Singer Company (PWH); 3Jan77; R651886.
The Singer Company|PWH