Rene',
Your rims are period correct for the late 60's/early 70's era but I don't believe that they were available as an option until around 1969 or so. Still, if you owned a 113 back at the time, one way to give it a sportier look was to purchase the "bundt pan" rims as these are sometimes refered to. Personally, I think these rims on your car do not detract from the appearence. The center cap should be silver like the rest if the wheel, however.
Kevin