It looks like a Depression Block.
http://www.quilterscache.com/D/DepressionBlock.html I know it looks very different scrappy.
It looks very different done in different colors. I just finished one done in Pink/Orange/White. Leftovers from a different quilt. The quilting isn't custom on mine. Just an allover design. So the quilting on the navy and white quilt really elevates the block/quilt design.
Although, I'm not entirely sure that the maker used all half square triangles??? So, it may have been constructed differently.