I was just looking through some screencaps because I wanted to see the stripes a bit closer. The cardback image is a still from chapter 8 of "The Mandalorian" during a flashback scene.
The funny thing? I found Death Watch Mandalorians who didn't appear to have any stripes. "1 stripe" is the Mando featured on the cardback - despite the figure having 2 stripes. And "3 stripes" is the Mandalorian that picks up the young Din Djarin from his hiding place, and eventually flies him out of the battlefield.
I actually had a total of 8 of the Death Watch Mandalorians on preorder - 2 in a case, another 4 from EE, and 2 more from Amazon. But after seeing the individual markings it made me realize that it might make troop building with them a little weird - especially if Hasbro goes the route of making a troop builder 4-pack with varying markings on the armor. So I cut my orders down to 4 of them.