British WWII Escape And Evade Razor Blades

4 X Kleen British WW2 Escape And Evade Razor Blades.Manufactured by Kleen and Clearly 1944 DatedThe Razor Blade is Broad Arrow Marked on the Side that Would have been Magnetised.When Placed on Water, it Would Float Then Slowly Turning the Razor Blade Pointing The Arrows to the North. (Tested)In Good Condition Blades May Have Age Related Marks as Per Photo's