Originally Posted by
BikeWonder
I have a Deer Head groupset of a 1985 or 86 with the superplate RD I salvaged from a damaged M1000... the stamps on the groupset have IK.
Thank you bike wonder, that codes for November of 1984, likely part of an '85 groupset. The earliest document I have seen for SP is May 1985, but literature for 83-85 is sparse.
Here are pics of shifters and derailleurs with the three types of the RD Centeron, Super Plate and standard
The Deer Head logo