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6 Vintage 1930s Black Czech 1.4cm Glass Heart Buttons
6 Vintage 1930s Black Czech 1.4cm Glass Heart Buttons
6 Vintage 1930s Black Czech 1.4cm Glass Heart Buttons
6 Vintage 1930s Black Czech 1.4cm Glass Heart Buttons

6 Vintage 1930s Black Czech 1.4cm Glass Heart Buttons

£3.00
Vintage Black Glass Buttons in the shape of hearts.
1.4cm wide, with an integral glass shank on the back (see last photo)
They were on display cards that have Made in Czechoslovakia printed on them. 
I found them in an old button warehouse I cleared.