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				First use of REVI 3a
			 
 Hi all,I am trying to estimate date of first use of REVI 3a/b gunsight. Now I know(I have picture or manual drawing) it was used on Ar 68(in service from 1936), FW 56(in service from 1935) and He 51(in service from 1934-but I dont have picture or drawing) . Does anybody have picture or manual drawing with this gunsight in first luftwaffe fighters Ar 64 and Ar 65(He 51)??? Or any clues when was production of this gungsight started?
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