PZL
Organizations
in wich Poland participates or participated

PZL

PZL (Państwowe Zakłady Lotnicze - State Aviation Works) was the main Polish aerospace manufacturer of the interwar period, and a brand of their aircraft. Based in Warsaw between 1928 and 1939, PZL introduced a variety of fighting and bomber planes. PZL not only produced military planes, but also gliders, helicopters, planes for agriculture and engines. After the fall of communism in Poland in 1989, these manufacturers became separate companies, still sharing the PZL name.
Type W3A Sokół                                                                          

Over time, most of the now-separate divisions were purchased by foreign concerns, and some continue to use PZL brand.

PZL-Świdnik S.A.
Communication Equipment Factory PZL-Świdnik S.A. is the biggest helicopter manufacturer in Poland.
Its main products are PZL W-3 Sokół and PZL SW-4 Puszczyk helicopters. In 2010 the factory was acquired by AgustaWestland, later by Leonardo.
More information

Polonica stamps:

German Dem. Rep. 1980, 10 VI
Mozambique 2013, 20 II
 S. Kitts and Nevis 2007, 28 XI
Turkey 2008, 25 IV