It's one of those times that I just grabbed the shirt and headed out to play, and never thought of what style number it was. I just knew I liked it right away. I couldn't find the tag it came with either... Sorry. But maybe Devin and other Ambassadors could help as well.
I suspect this shirt has been hanging at the pro shop for a while.
The newer one in Spring collections are:
Nassau Performance Shirt
21307 Jacquard (Navy collar)
Tahoe Performance Shirt
21308 Jacquard (Gray collar)
The pattern looks a lot alike, but the collar isn't black like the one I had in my picture.
At www.golflocker.com, I see a 21307 Navy with white accents (really nice!)