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- Remains of “Integrale” decal on propeller made by Industrial Works of Wapienice (photo M. Peikert)
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- “Ikar” decal on Integrale Warszawa propeller made by Szomański’s factory (photo R. Wróbel)
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- Integrale Warszawa marking stamped on a hub of propeller made in August 1928 by Szomański’s factory (photo R. Wróbel)
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- Integrale propeller on Avia WZ-1 engine (photo: Narodowe Archiwum Cyfrowe)
Propellers marked as Integrale were manufactured by at least two factories:
– Fabryka Śmigieł i Wyrobów Drzewnych Włodzimierz Szomański (Propeller And Wooden Products Factory owned by Włodzimierz Szomański) Warsaw,
– Wapienickie Zakłady Przemysłowe (Industrial Works of Wapienice) located at Bielsko-Wapienice.
There is at least one known propeller with “Integrale Warszawa” marking on the hub and Szomański’s “Ikar” decal on a front of blade.
Propellers manufactured by factory in Bielsko had factory name stamped on the hub and Integrale decal on each blade.