K

K: U.S. Offices in China. Scott catalog number prefix to identify stamps other than standard postage.
KEY PLATE: The printing plate that prints the stamp's design and used in conjunction with a duty plate.
KEY TYPE: Issues of two or more postal administrations using the same stamp design.
KILLER: Any obliterating postmark that will render re-use of a stamp impossible.
KILLER BARS: Horizontal lines which are typically used to cancel a stamp.
KILOWARE: Term used by dealers or countries to sell mixtures of stamps on paper. A kilo is approximately 2 1/3 pounds.
KNIFE: The cutting edge of the machine which cuts the envelope blank. Also, the size and shape of the die-cut papers from which the envelopes are folded.
K P C: Korean Specialized Postage Stamp Catalog