Every day it’s getting colder outside. The low temperature remains also in an unheated space of the railway signalling and traffic control exhibition. Nevertheless, this fact did not discouraged us from continuing the work on renovation of yet another exhibit. This time we took care after the small lever frame from an intermediate signal box, yet another product of the former Railway Signal Works in Kraków (Państwowa Wytwórnia Sygnałów i Urządzeń Kolejowych). It’s one of the simplest standarized frames consisting of only two levers to control the block signals, very simple interlocking and a four-division block instrument. After completing the renovation, the frame will be prepared to cooperate with other devices from the exhibition, which are already in a working order.