"PAT. 2,189,285 - FOREIGN PATENTS APPLIED FOR
SAWYER'S PORTLAND ORE.
Reel Number S 17 MADE IN U.S.A."
In sleeve with handwritten "set IX" and the following printed:
"NAVAL AVIATION TRAINING DIVISION
[ SPECIAL DEVICES ]
UNITED STATES NAVY
Photography by
TRANSFILM, Inc.
NEW YORK"
In the 1940s, the United States military recognized the potential for using View-Master products for personnel training, purchasing 100,000 viewers and nearly six million disks from 1942 to the end of World War II, in 1945. (Wikipedia)