RAF SECTOR CLOCK DIAL - LTD EDITION - GD3

A one-off print-run of a dial that was used on later versions of the RAF's Operation Centre Clocks.

"Incoming reports at RAF Ops Rooms would be shown by colour coded flags of either red, yellow or blue according to time of receipt.  ROC Ops Rooms used coloured arrows plotted on the Ops Table according to the position of the Minute Hand on the Coloured segment of the Sector Clock at a succession of 5 Minute intervals.  This was later reduced to 2.5 Minute intervals as aircraft speeds increased during the end of WW2 and start of the Cold War. "

http://www.roc-heritage.co.uk/operations-centre-clock.html

250mm diameter.