1871/72, 100 mon blue, plate I, position 5, used in combination with 1 sen blue, plate III, both tied by oval non-standard "Kochi Meiji 7.1.3" (3 January 1874) to the reverse of a cover to Osaka, with large double-circle arrival marking of Meiji 7.1.7.

A late and highly unusual usage of the 100 mon issue, made particularly notable by the same-colour, same-denomination mixed franking. Such combinations are seldom encountered and possess strong specialist appeal.

Rate: 6 sen, triple-weight inland cover of the unified rate period from Meiji 6.4.1 (1 April 1873).

Reference: Illustrated in Dragon Covers, p. 182.