Here is a close up of the rub rail with the diamond pattern and a Nordic Shield carved at each end.
The first step up piece of the coaming is installed all the way around. It is split in half with 3/8" attached to the first layer and 3/8" above the first layer to provide a shoulder to attach the next outside piece.
It is hard to see the seam but the second outside piece is in place attached to the stepped up inner piece and clamped down on the shoulder of the outside piece. This process will continue until the coaming is about 4" high. There will be three layers of 1/4" strips in all making the coaming 3/4" thick.