Watermark and Type Check - The flat plate stamp must be checked for
watermark; if it is double-line watermarked there is no need to check for
anything else, the stamp is Scott 345. If it is unwatermarked, it can be
either of two types, Type I or Type II. Please note that unlike the 1¢ and
2¢ stamps the 3¢ flat plate imperforate is not found on single-line
watermarked paper.
Watermark
Type
Scott Number
Privately
Perforated by the Following Companies/Types
double-line
I
345
Brinkerhoff I, II, IIa,
IIb; International Vending Machine
Mailometer I, II, III, IV;
Schermack I, II, III; USAV I, II, III
