This listing is for a full box of vintage cardboard thread bobbins manufactured by the American Thread Company. This turn-of-the-century company supplied the many East Coast textile mills with ready-made bobbins for their sewing machines. Each spool has 36 yards of deep grey thread. I would guess these date back to the 1950's but they could be older. I have used them often for display because they are so humble and beautiful. They also make great present toppers by threading ribbon through the center hole. They could even be used to hold a birthday candle for your favorite seamstress.