Can anyone please help me to identify the following object : Made of brass with steel parts It stands on a circular base 9.5 cms diameter. There are three legs, 8 cms high On them, a horizontal ring 9 cms diameter and 2 cms deep. Underneath the ring is scratched SP 640036 The ring is marked in two sets of degrees 0 to 180 each. At 0 degrees is a vertical ring 14 cms diameter. On one side is engraved "Scientific Precision" and "Made in England" On the other side is marked -90 to +90 degrees. A moveable knob slides around the "degree" side. The knob has a plunger which causes a pin to appear on the interior edge. Inside the ring, attached on spindles at vertical top and bottom is a thin ring. Inside the ring is a plate which can be turned almost 90 degrees. It is marked -90 to +90 degrees. Across the centre of the plate and at right angles to it is another plate, attached by a central spindle. It is marked 0 to 360 degrees and "E" and "W". There are no apparent time markings on the object. There is no apparent date marked on the object.
Help please. -- Ian Trackman email : [EMAIL PROTECTED]
