Many 'swagger sticks' and 'pace sticks' are reproduced as they can be fairly cheap, and are decorative. The photos (without setting up an account to log in) are rather small but from what I can see it looks to be a quality made item, and may also be a 'sword stick' (which is a blade attached that can be drawn). If so it would give more credence to it being a period item, and that the crown/eagle/RAF was in use at the time.
Good spot!
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