Lot of 7 OLD Buttons Vintage Antique Iridescent Shell Mother of Pearl Sewing S1

Description

LOT OF 7 buttons - approximately 1" diameter. Similar style, each one is unique.  These have a somewhat wavy feel and have a beautiful iridescent rainbow like reflection in the light. Very pretty.
Vintage Shell / Mother of Pearl BUTTONS - I am unsure what type of shell these are.
I AM NOT AN EXPERT ON MATERIALS SO I CANT GUARANTEE MY ANALYSIS OF THE CONTENT IS 100% ACCURATE. I am happy to answer questions.
AGE: UNKNOWN.
See all photos, some photos include a ruler or coin to show size and scale.
Review photos to see condition and quantity. The buttons in the photos are the actual buttons that you will receive.
These show signs of wear, they are not perfect , but they are appear to be in excellent condition for their age. Sold AS IS - no guarantee on content which is untested and unknown as I am not an expert. I DID NOT CLEAN THE BUTTONS IN ANY WAY.
They may be dirty, and the buyer will prefer to decide if and how to clean them. see photos which show exact buttons you will receive.
These buttons are great for collectors as well as a variety of projects, including historic restoration work, costume design and historic reenactment projects.