How do you tell what year a D60 is? I was assuming that the one I took out of my 79 K30 was a 79. I just spent about 3 hours w/ a putty knife, Dawn dishwashing soap, a brush and some good of fashion elbow grease cleaning it up. The knuckes are a different color than the housing, and the housing seems to have some writing on it (not readable). I was wondering if this is possibly a newer frontend that may have been swapped in at sometime over the last 25 years.