I found these in a basement of a 'button' store in the Garment District in NYC.  They were new and never used.

I am not sure of the materials in the buttons.  I am not sure if they are all metal, all plastic, or metal with a plastic top.  They are round with a geometric design. all black.

Some buttons have small spots on.  I think the spots could be removed or covered up if desired.

Buttons are 1-1/2 inches in diameter.

Cost is $20. for all buttons, which is less than 25 cents each. They are really nice and look fun and vintage. 

Attention: dressmakers and seamstresses.