Q
QuadrillEpaper - Patterned or watermarked paper with criss-cross lines.
Quartz lamp - One of several kinds of electric lamp giving radiation mainly in the ultra-violet part of the spectrum; used for observing phosphors.
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Quartz lamp: a lamp with a quartz filament that shows repairs or tampering on stamps; used for observing phosphors.
Quatrefoil watermark: see Rosace.
Quattrino: unit of currency in the Italian state of Tuscany until 1860.
 See also: Adhesive, Ship letter, Cover, Catalogue, Stamp Collecting
  
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