Question for 1987 SL Owners

[SLeazy Rider]

I am ordering seat covers online from Performance Products and they ask two questions: (1) how many vertical pleats do your seats have; and (2) do the covers have single needle or double needle stitching between the pleats? Because my car is at the paint shop, I cannot look at my original covers (and the paint shop has not returned my call). I pulled up ebay, looked at pictures of seats from 1987 SL's and determined they all had 6 pleats. However, I could not tell whether they had single or double needle stitching. Could someone with a 1987 who has original seats please look and give me the answer to the second question, so I can make sure I ordered the correct covers? Thanks in advance.

Glenn