Spider sight from ww2 ?

[wksjr66]

Was interested if anyone could tell me what this sight came off of ? My searches came back to m34 spider sight but did not see one with this exact mount. It is roughly 5 inches in diameter and cannot find any markings. Any help would be appreciated

 

[Steve300xcw]

Google search the pic you posted..

 

[nm.otter]

Anti-aircraft sight for the MG 34.