Stanley Gibbons Dual Wave UV Lamp Books David Bowers’s multiple-book Whitman Encyclopedia

David Bowers’s multiple-book Whitman Encyclopedia of Obsolete Paper Money covers in great detail the states of Alabama

18 openings

Somali Coast

A total of 22 pages are included in this supplement

Stanley Gibbons Dual Wave UV Lamp Books David Bowers’s multiple-book Whitman EncyclopediaThe archetypal tool to detect phosphor papers and inks for the majority of the 20th Century Machin stamps of Great Britain, Israel, USA, Finland and the early phosphors of , Norway, Mexico, France, Hong Kong, People's Republic of China, Russia and later issues of Canada and Mexico. The lamp has a spectrum of 254 to 390 nm (nanometers) and therefore covers both "short" and "long" wavelengths. Ultraviolet Lamp features: Broad wavelength covers both