A 7 lever Westinghouse Brake & Signal Co. Ltd. Style 'L' Power Lever frame number 139 was supplied for teaching purposes and was installed at Longmoor Camp Hampshire. It was ordered by the Ministry of Supply for the Longmoor Military Railway to teach members of the Royal Engineers.
Above is depicted a typical demonstration Style 'L' miniature lever frame as supplied by Westinghouse Brake and signal Co Ltd., It has not been possible to obtain a picture of the Longmoor lever frame, I have included a picture from John Francis book showing lever frame 40 constructed in 1929 with its wooden oiled teak casing . This shows spaces in lever position 7 & 8 as well as position 12, the 3 levers showing are numbers 9, 10 & 11. In front of the levers are the 'lead plates' Lever 9 operates the points, with its N & R indicator behind the lever. Levers 10 & 11 operate the 4 aspect coloured light signal which have each aspect repeated behind the respective lever. Photograph is copyright to Westinghouse Brake & Signal Co. Limitedy