Hi,
die Flugzeugserie Blau sind aus 1980
Schiffe gibts in verschiedenen farblichen Serien. Rot 1978, Braun wie oben 1980, Blau, Gelb 1979-1981
Bin aber nicht 100% sicher. Kann noch mehr Jahrgänge und Farben geben.
Hier noch was zum lesen:
Guam guard mail 1980 local post martin m-130 flying boat block vf-nh, dull gum. Issued for government interagency local mail. _guam issued 'guard mail' stamps in 1930. The local postal service was discontinued april 8th, 1931, and replaced by the united states post office department. Guam resumed issuing 'guard mail' stamps in 1976 and continued through 1981. Their official usage was limited and the stamps were mostly used as cinderellas or christmas seals._
