It's definitely not Sentinel.

It might be Tribute (from Emigre), although your sample looks a bit bolder. A stroke might have been added, or that weight gain might be a product of the vinyl cutting process.

http://emigre.com/fontpage.php?STrbR.html

I was also sure it was not Sentinel.

Although it's very close, I'm not sure it's Tribute either.

Thanks for posting. Yes, it seems that the typeface used has a lower x-height as Tribute, but it's really close...
it can also be what you are saying that it "gained weight" in the "vinyl?" cut process.

Patty.