About the propeller. The propeller was produced by Polish workshops Szomański Warsaw. The whole story of the propeller stayes unknown. Traces take it to Germany, where it was repainted to orange colour (about year 2000).  Privately owned, was available on an internet bid in 2014.

Construction.  The propeller lamination consists of 6 ash plies. Propeller coating was black, Tonkilaque (including aluminium sheathing).

Aircraft and Engine. The propeller was used for RWD-8 training aircraft and was working with 4-cylinder in-line Walter Junior engine.

References:

1.  Opis Płatowca RWD-8, Ministerstwo Spraw Wojskowych, Departament Aeronautyki, Warszawa