They definitely look like single line markers to me. The res looks pretty good on my phone too... and yes, mine are single markers. I don't have the watch in front of me at the moment to double check but I'm 99 percent confident in my answer. I would've noticed it as I've been looking at the watch like a kid looks at cake the last few days...haa. I'll take another look when I get home in a few hours and let you know.