RNAS Officer's cap badge

[RCN]

Saw this example recently, but have my doubts on the badge, altho with that age patina it appears at first to be 'kosher'.

However, I did note a couple of concerns:

the central eagle is very large - it should be about 1/2 that size - it appears to be an RNAS sleeve eagle to me,

& the central jewel in the crown is blue, & it should be red for that time frame.





What are reader's thoughts on this badge pls?

Bryan