Image of two thermostat valves laid on a white surface. On the left is a white thermostat valve with brand name "Danfoss" clearly visible on its front. It has numbers ranging from 1 to 5 around the dial, with additional markers for frost protection (*) and an off position (0). The one on the right appears older, with a beige or light brown color and a similar design, also labeled "Danfoss Thermostat." It shows signs of wear and possibly paint stains. Old Danfoss Thermostats.