I see massive Machine doubling (which can be common on the SMS Sets) but I do not see any die doubling.
Even on the "L"? It seems strange to me that it's creating a right angle. PCGS is reporting 2 known DDO's for this year, but they haven't yet supplied pics.
You can see CONECA has 17 listed Doubled Die Obverse half dollars for 1967...but yours is MDD. http://www.varietyvista.com/Variety Master Listings/kennedy doubled dies 1967-1970.htm#_1967 Larry Nienaber
I came across a 1967 SMS Set at a local show that, using my loupe, I thought for sure was a DDO. When I got it home I coule plainly see that it was a magnificent case of machine doubling.