"The only thing necessary for the triumph of evil is for good men to do nothing". (Edmund Burke)
Hi Spitfire 99
The prop is marked with an R which conforms with the international standard for a clockwise rotating shaft.
Those marked with an L are anti-clockwise.
They offer a free download catalogue, listing all their props which may be of interest
http://www.raboeschmodels.com/downloads/documents/catalog/RABOESCH_CATALOGUS-2017-WEB.pdf
Evening
This is a photo of a right M4 prop. Which does it need to spin for forward propulsion
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