Antique Coats & Clark Button/Carpet Thread versus New Singer Button/Carpet Thread

Coats & Clark Dual Duty Plus Button & Carpet Thread - A Threaded Needle

I don't know how much thread is left, doesn't look like much if the spool was used.

Vintage Coats and Clark O.N.T. RED Button and Carpet Thread Blue Wooden Spool

Does anyone understand Coats & Clark thread designations? - Victorian Sweatshop Forum

Antique Coats & Clark Button/Carpet Thread versus New Singer

Coats & Clark Plus Button Carpet Thread 50yd Frst Green 6770 - 123Stitch

Coats & Clark Dual Duty Plus® Button & Carpet Thread 50yd.

Dual Duty Plus Button and Craft Thread

Coats & Clark Dual Duty Plus Button & Craft Thread, 50 yards/45 meters, Yale Blue.

Dual Duty Plus Button and Craft Thread

Vintage Rare and Interesting Thread Spools: Carlson Currier, Marshall & Co, J. and P. Coats, American Thread, Clark Thread Co and More - Canada

Singer Button & Carpet Thread 50yd-Black

Dual Duty Plus Button & Carpet Thread

This heavy thread is designed for hand sewing where extra strength is required, such as when sewing buttons on coats and bindings on rugs. Dual Duty

Coats & Clark Dual Duty Plus® Button & Carpet Thread, Cream