This is an interesting view, from May 15th, 1929, of the Central Motor Repair Shop showing N.Y. City Police Department Indian motorcycles.
For a clearer, more detailed, view, please follow the link below:-
Motor repair Workshop 1929.
It is a part of the vast Archives available online from the New York City Municipal Archives.
http://www.nyc.gov/html/records/html/gallery/home.shtml
Thanks to The Atlantic.com for the link
Colins Place 