Heavy duty American made woodworking vise from Columbian Vise and MFG Co. Jaws are 10" wide and open to 12". It has a retractable "dog" for work holding above the level of the main jaws.
It mounts to the underside of a workbench and features an ingenious quick release system on the spindle nut. Please inspect photos for condition as it has signs of use like light surface rust/patina and chilled paint, for example.