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the rear mech is a Simplex model 637 which did not launch until 1970
but then i recall the Record model bicycle as coming with Huret gears at this time so this gear mech may be a replacement
what is the marking on the clamp on the downtube - if Huret it would suggest rear mech to be a replacement
my guesstimate just from paint/transfers/lugs/headplate would be 1969-1970
if the Simplex Prestige model 637 gear mech is original there is a good possibility it may date the bicycle as some of them are date marked on the back side as here -
View attachment 1463281
1969 U.S. market catalogue page -
View attachment 1463287
1970 U.S. market catalogue page -
View attachment 1463290
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