By modifying the different combinations you can activate magnifications of 1

The base has optical sensors built-in with a sensitivity adjustment

1x B-MB3 WOWMotherboard

Model Number: 15711

including four each of the Pennsy's signature round and flat sided signal heads

Atlas 2707 O Scale Golden Valley Depot ProductID_12029957 By modifying the different combinationsThis is Atlas 2707 O Golden Valley Depot. By the late 1800s, the combination depot became a standard on railroads both big and small and since has serviced generations of Americans. The Golden Valley Depot is modeled after such depots which can still be found across the nation. Its key features are: Includes nonworking semaphore style train order signal Herringbone pattern brick platform Baggage cart and decal signs Interior light Approximate