Two-Arm Semaphore Pocket Signal Disk
A "Two-Arm Semaphore Pocket Signal Disk," by L. A. Clapp and dated 1914.
See also the other side of this wheel chart: International Morse Code Pocket Signal Disk.
An announcement regarding a different version of this Pocket Signal Disk appeared in The Bookseller, Newsdealer, and Stationer, Oct. 1, 1918, pp. 392-93:
"The Standard Novelty Company, Melrose, Mass., are the exclusive makers of a novel study device that is a patriotic sales item. It is the Pocket Signal Disk, the Pioneer Code-Alphabet Instructor, by Major Leander A. Clapp, U.S.M.C. It is an army and navy combination that should be displayed by the leading booksellers, stationers, and newsdealers, and in military and naval stores. The disk has been endorsed by students and instructors as a practical method for self-instruction and examination in the regulation signal codes of the army and navy, and its simplicity has strongly appealed to those in the various branches of the service, as well as to those in academies, colleges, vocational schools, boy scout and kindred organizations. A good supply of this 'Help-Win-the-War' device will bring results. It retails for 25 cents."
Interested in wheel charts and volvelles? Please join the Vintage Wheel Charts group and add any examples you'd like to share!
Two-Arm Semaphore Pocket Signal Disk
A "Two-Arm Semaphore Pocket Signal Disk," by L. A. Clapp and dated 1914.
See also the other side of this wheel chart: International Morse Code Pocket Signal Disk.
An announcement regarding a different version of this Pocket Signal Disk appeared in The Bookseller, Newsdealer, and Stationer, Oct. 1, 1918, pp. 392-93:
"The Standard Novelty Company, Melrose, Mass., are the exclusive makers of a novel study device that is a patriotic sales item. It is the Pocket Signal Disk, the Pioneer Code-Alphabet Instructor, by Major Leander A. Clapp, U.S.M.C. It is an army and navy combination that should be displayed by the leading booksellers, stationers, and newsdealers, and in military and naval stores. The disk has been endorsed by students and instructors as a practical method for self-instruction and examination in the regulation signal codes of the army and navy, and its simplicity has strongly appealed to those in the various branches of the service, as well as to those in academies, colleges, vocational schools, boy scout and kindred organizations. A good supply of this 'Help-Win-the-War' device will bring results. It retails for 25 cents."
Interested in wheel charts and volvelles? Please join the Vintage Wheel Charts group and add any examples you'd like to share!