01 January (Portugal ) within release Vliegtuig propellor goes into circulation Stamp Shield and Propeller face value 20 Portuguese escudo
Stamp Shield and Propeller in catalogues | |
---|---|
Michel: | Mi:PT 596 |
Stamp is square format.
Also in the issue Vliegtuig propellor:
Stamp Shield and Propeller it reflects the thematic directions:
A coat of arms is an heraldic visual design on an escutcheon (i.e. shield), surcoat, or tabard. The coat of arms on an escutcheon forms the central element of the full heraldic achievement which in its whole consists of shield, supporters, crest, and motto. A coat of arms is traditionally unique to an individual person, family (except in the United Kingdom), state, organisation or corporation.
An aircraft is a machine that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. The human activity that surrounds aircraft is called aviation. Crewed aircraft are flown by an onboard pilot, but unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as lift type, aircraft propulsion, usage and others.