Here we have the first fully transistorised colour television receiver in the world. This HMV Colourmaster Model 2700, introduced in 1968, uses a 25 inch MAZDA shadow-mask tube. This being a colour dual standard, is capable of 405 line and 625 line. There are eight detachable circuit boards which are placed all around a rectangular frame which forms the main chassis. The whole unit can be slid out on rails to aid access and servicing.