The drawer contains c 300 aperture cards of drawings

of GEC Witton WT-series motors and other GEC(W) equipment; BTH Rugby and are of electrical machines and details, and Alfred Wiseman & Co Ltd, Birmingham or Grantham (later drawings). Drawing number ranges are X105831 - X133846; X2528745 - X3041799; SKC164921 - Y2528743; G70401 - G36437; AG8741 M - AG28510. Samples are below: