Actually I am not so confident that it is endex actually. I know in the Army that the receipt and wearing of wings commences before you are qualified on type.
I have seen numerous failed jet pilots wearing wings whilst on multi or rotary conversion.
I don't believe it was dishonest of Siam to wear them if he was awarded them even if only probationary. It wasnt entirely upfront but it is a business page why broadcast you never made LCR? He was awarded probationary wings he achieved that therefore wear them.