RAF operations room plotting table counter

'Operations Room Plotting Counter, Hand Plotting, Shield, Plastic, Yellow' A.M Ref. 4M/23, F.C Ref. AC/3.  Incredibly rare Operations Room 'counters' used to display important information relating to an enemy raid.  When details of aircraft were received at Group Filter Room level it was interpreted on a map table using plotting 'counters' in the form of coloured arrows, discs and shields.  Shields like this one indicated aircraft heard over land or sea by Observers.  The colour of the plotting pieces related directly to those on the sector clock such that information was updated every 5 minutes.  Here we are offering one yellow shield.  It is approximately 2.1cm long, made from some form of early plastic and a little soiled but in very good overall condition.  Note it is more of an orange colour in reality!  A fantastic opportunity to create a small Battle of Britain Operations Room display.  If you are lucky enough to own a sector clock then this is a must have item.  NB, map/other items are shown for display purposes only.  Stock code M23374-3N.