Aunt Em's Quilt Patterns

I spotted this design on Moda's website, United Notions. It's an Aunt Em pattern found here. I love the retro feel of the clam shells pattern and the circle design is quite unique-looking. I'm guesing the clam shells are appliqued or pieced, but haven't purchased the PDF pattern yet. Very tempted to try to work it out myself. The fabric is Salt Air by Cosmo Cricket for Moda.

Also love the beach ball pattern using the same fabric: