desc_issuer: Mexico desc_issue: 1929 air desc_denom: 20c Used by 1 overprinted stamp: Mexico airmail 1931 15c brnol d=arms of Mexico & airplane oc=blk on=issue=1929 air-20c wmk=MEX & eagle Not used by any images. Matches 1 type: Mexico airmail 1929 20c brnol issue=1929 air d=arms of Mexico & airplane wmk=MEX & eagle |