14th September 2012, 12:26 PM
Don't knock it, I've had occasion to distinguish two intercutting previous trial trenches in Durham by checking the sell-by dates on Mars bar wrappers and coke cans (considered a healthy digger-diet in the early 80s) - considering they were dug in 1983 and 1984, and hence in some cases I was running from batch-numbers, I think that's about as precision-dating as it gets :face-approve: