SOE tyre puncture. Comprising one American made Christmas tree tyre puncture, 67mm high. An American made tyre puncture in cast steel and painted in olive drap. A British-made four-point mechanical tyre puncture. Two simplified versions. SOE tire spikes. Includes a US made Christmas tree type tire spike height 67 mm. A US made cast steel spike painted olive drab. An English made mechanical four point spike. Two simplified versions.