Here are the markings off the hub:
Pattern No. 1569800
1003755
HSP 7061-C
MFG 25616

Diameter is 7’2″, so I think it scales well with that shown in the picture of the TWA-4 – considering mechanic of average height!

Can anybody tell me when this prop would be from given any of the above numbers on the hub, or trace any further details such as customer?

Much appreciated.