I am very surprise you bought this on WAF as it is a Staegemier fake. This one must have get trought the net...The detail on the eagle is too prononce and the reverse show castin and it dosent have the 4 circles and many little things are wrong like edges, molding lines etc..... I am not surprise you had a wrong opinion on GCA but very surprise that you actually received thumbs up on WAF as this badge have been discussed here:
They can't be early release as the A L/64 mark came very late in the war.
P.S. IMO mean In my opinion.