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.