This depends on what you consider to be a "Third Issue".
Most people call the 1993 to 1995 model to be a "Fourth Issue". Those came with Pachmayr Compac grips with gold medallions.
The Third Issue DS was made from 1973 to 1986. Those had the walnut Combat grips as standard, unless it was a special order.
The rubber Compac grips with silver medallions didn't appear until 1995. That was the first time Colt used Silver medallions on the Compac rubber grip and they were used on that years Colt Detective Special and the new SF-VI.