Cochin China

Not to be confused with Cochin, an Indian feudatory state Cochin China, or Cochinchine, was a French colony, the southern part of what is now Vietnam.

Prior to issuing its own stamps, French colonies general issues were used. Usages can be identified by CDSs or diamond-shaped killers/obliterators with CCH.  File:Fr col Ceres 80c.jpg|CCH cancel on 80c Ceres colonial stamp File:Cochin China 5 C.CH A..webp|5c on 2c with "C. CH." File:Cochin China 5 on 25.jpg|1886 5c on 20c File:Cochina china 5 on 25.jpg|1887 5c on 20c File:Cochin China 15 15.jpg|1888 unissued bisect pair. Many cancelled example are around – do you think they're genuine? 
 * In 1886-87, printed "5" (centimes) surcharges on colonial type Alphée Dubois stamps were issued, two with an additional C. CH.
 * 30c type Alphée Dubois stamps with two "15" surcharges and a diagonal printed dividing line for cutting into bisects was prepared but never issued in 1888. Whole stamps exist with forged or posthumous cancels.
 * Imperf French colonies postage dues overprinted diagonally COCHINCHINE are bogus.
 * In 1892, Cochin China was incorporated into Indochina.