Again it's good to highlight a wonderful submission this time from Lee Martin who used to work on the LIFFE floor. Lee copied this page from a LIFFE booklet on handsignals and indeed I need to correct some of the signals on tradingpithistory.com as some are incorrect. The reason why they're incorrect is that I could only find one person who could recall what he thought were the serial month signals and some were wrong so they'll be corrected ASAP.
It might seem like a simple task to have gotten these but I've spent years and contacted a handful of ex-LIFFE workers and everyone came up blank on them, and I'm talking friends of friends who should've known but didn't.