Vintage 

Diamalloy 

Diamond Calk 

12" Adjustable Wrench 

Forged Steel

Capacity Measures: 1-3/8"

1lb. 5oz. Tool

USA

****

Very much in good working condition showing some age and wear, with smooth rolling, parallel jaws and very little play.  It's not an outright "rattler" per se. No owner's marks.