Lot of 30 Vintage Old Sewing Buttons Dark Blue Tone Plastic Vegetable Ivory ?

Description

LOT OF 30 buttons
Vintage Plastic BUTTONS - I am unsure what type of Plastic these are. These might be "vegetable ivory", but I have no idea how to tell.
I am not an expert on materials so I cannot 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.
These show signs of wear, they are not perfect , but they are appear to be in good condition for their age. Sold AS IS - no guarantee on content which is untested and unknown as I am not an expert. Estate sale find, from the estate of a lady who was a professional seamstress.  Some of her buttons, notions and trims are very very old. These are being listed as found, I did not clean or repair any of them.
They may need to be cleaned, 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.