Enquiry

Of cast brass with an openwork pattern of hexagons and six-pointed stars. It is in the form of a 45 degree isosceles triangle with a flange protruding under one the short sides to enable the craftsman to run it along the edge of a wooden board or stone slab in order to mark on it a 45 or 90 degree angle.  Under the name of ‘Speed Square’, this same tool is still in wide use by the building trade in the West today.