United Kingdom. An Air Board Technical Notes Manual Province of China maker makred “RM” at the

maker makred “RM” at the base (Professor R

centrepiece insignia illustrating a tree and surrounded by the inscription "HONOR Y SERVICIO A DIOS Y A ESPANA" (Honour and Service to God and Spain)

NEW YORK" with the company's insignia and marked "STERLING" on the reverse

1913-1924 issue

in overall near mint fine condition

United Kingdom. An Air Board Technical Notes Manual Province of China maker makred “RM” at theAn Air Board Technical Notes Manual with Rigging Notes for various aircraft (Bristol Fighter, De Havilland, etc.), first page named to Everill B. Horton, 22 Old River Road, Barrington, R. I., spine bound in black tape, fraying to edges and generally worn, near very fine.