the outer curve is the same as Radius 2

Typical of American libraries built 1900s to late 1930s

Here is a MTH 20-98708 Canadian National 75' AutoTrain Auto Carrier

Color does make a difference

The Trainz SKU for this item is P12339577

MTH 45-1028 O Gauge ScaleTrax Infrared Track Activation Device ITAD LastUpdated_20262904144931 the outer curve is theHere is one This is a MTH 45 1028 O ScaleTrax Infared Track Activation Device ITAD. The ITAD is used to detect trains passing by it to trip signals or accessories. This replaces hard wired detectors like contactors and insulated track sections and does not rely on track power. It also provides an adjustable relay delay and adjustable sensitivity as well. It was made to look like a scale sized railroad control box and it measures 3 inches long and is 2