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Backing Color Available: ClearHeight: 51mmLength: 210mmCommon Uses for This Size: US Jumbo Singles
2024 edition • 472 pages • Large Print Edition
• Postal Notes
18 openings
Stanley Gibbons Dual Wave UV Lamp Books Backing Color Available: ClearHeight: 51mmLength:The 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
