2 Boxes of Dark Grey Cotton Thread 12 spools x 50yds Vintage Italian MONA LISA Box

2 Vintage Italian MONA LISA Boxes of Dark Grey thread.
The boxes are sometimes a little grubby or bashed but inside each box
there are 12 spools - each 50 yds long and with
"maximum strength and elasticity"
On the cellophane wrapper on each spool is printed, in Italian :
MERCERISED SUPER COMBED AND GASSED THREAD