Waterslide transfer sheet including registration plates, vehicle names and patrol markings (T & W). T & W, the latter disbanded in 1940, were both New Zealander patrols, hence the kiwi decal. The sheet measures approximately 7.75 x 2.5cm. Photo copyright Company B.
There is some useful info on patrol markings here - http://lrdg.hegewisch.net/OClrdg.html