This is an antique saw sharpening vice / clamp which can be attached to a gate. 

Made from dark oak with a lever with cast iron and brass fixings which when pulled, tightens the jaws so that the saw can be held steady.

Great item for a collector or for display.
 

Measurements:
Length - 66cm
Jaws length - 30cm
Lever length - 17.5cm
Weight - 2445g