1978 8.4¢ Grand Piano Precanceled
Americana Series Coil Stamps
Issue Date: July 13, 1978
City: Interlochen, MI
Printed By: Bureau of Engraving and Printing
Printing Method: Engraved
Perforation: 10 vertically
Color: Dark blue
The grand piano is comprised of 230 steel-wire strings and is tuned to 88 different notes. Its shortest string is only 2 inches long, while the longest string is 80 inches.
This stamp is distinguishable from U.S. #1615C by the horizontal lines of the precancel printed by the Bureau of Engraving and Printing.