Fi-103 / V-1 in ww2 and after..

V-1s were built in large series in several and that's way there were differed appearance. The Fi 103/A1 and the Fi 103/A1 differentiated in the fashion of the front part with warhead.
There were built approximately 32.000 of the V-1 missile. In the end of the war and especially after them V-1 was copied and tested in several countries: in the U.S.A. (JB-2 of USAF and LTV-N-2 of US Navy), France (Arsenal 5501 and CT-10), Sweden (Robot 315) and the U.S.S.R. (10Ch and twin-engined D-5).

mac.distribution.cz...
www.designation-systems.net...
www.warbirdsresourcegroup.org...

Some more info/talk about the v-1 and copies (Loons, D-5 etc.)

My point: "The first in the sequence of the USN's submarine based strategic missiles. LTV-N-2 Loon (a postwar development of the German 'v-1' flying bomb) "

development -> Read COPY