Variously referred to as click-clack or flip clocks these fine pieces of eighties technology were once found all over Network SouthEast route's stations. With their distinctive sound, they kept the travelling public informed of the time accurately wherever they may have been. I believe that there are just six left in operation with this being one of them at Stansted Mountfitchet on the up platform. Whilst this example has lost its NSE branding and colouring it is still faithfully keeping time! The last examples that I photographed were back at Liverpool Street in 2019, see.... https://www.ontheupfast.com/p/21936chg/26206737404/x90006-13-30-london-liverpool-street and before that at Victoria station during 2015, see.... https://www.ontheupfast.com/p/21936chg/28842982404/x465047-11-36-orpington-london-victoria I believe that both of these have now been removed.