A station on the Bakerloo Line and London Overground on the boundary between Travelcard Zone 2 and Travelcard Zone 3. The mainline services arrived in 1866 and the Bakerloo 10 May 1915.
The Bakerloo and Euston Railway Station-Watford Junction Station use the lower level platforms and the Stratford Station-Richmond Station and Willesden Junction/Stratford-Clapham Junction Station services are on the high level.
The Wikipedia page is [1] and the TfL page is [2] and [3]. The Disused Stations page [4].
See also Willesden Green Station