Vintage Colt sewing buttons confirmed pattern # 39, a shank flower like button with 3 petals, sold by the each button
Coltrock Colt fire arms made buttons in the 1940s.
This is a confirmed pattern, # 39, in sizes 5/8", 3/4", and 7/8"
Note: the white ones have some small discoloration.
While these are vintage used buttons they are in excellent condition.
Please see all of the photos.