BIG 4.4cm Vintage Deep Blue or Dark Blue Lucite Button

A Very Big - 4.4cm - vintage lucite button.

A textured matt surface - either an intense blue or a very dark blue, almost black in lower light, and  with a metal adornment in the centre.

They were found in an old button warehouse and are probably French.

I just have a few - selling them singly so this price is for 1 button.