German Luftwaffe (Air force) qualification badge for Radio operator & Air gunner roles. The lightening bolts in the Eagles claws signify the Radio aspect. This example was produced by W. Deumer of Ludenscheid.
Please note that all Luftwaffe badges by this manufacturer (and indeed other manufacturers) are heavily copied due to their economic values within the medal and badge collecting community.

Close up image of the Eagles head and beak where fine detailing can be appreciated

Similar level of detail on the wing feathers as per seen on the head and beak image

Reverse of the W Deumer Ludenscheid ROAG badge

Hinge construction profile, Note the support plate beneath the hinge

Hinge showing construction and affixing methods

Flatwire catch with pad beneath for attachement to the badge

Manufacturers marking impressed / stamped into the reverse of the Eagle. W. DEUMER LUDENSCHEID in block letters

Rivet detail. Here the two piece construction is shown clearly. Be sure to study the rivet type!