Keystone 16mm key wound movie camera 1930s
Above is a 1930's movie camera from Ketstone that you was hand wound. Id is the typcial piece of equipment private-eyes had to work with at the time. However, if you were an investigative agency that could actually take motion pictures on a surveillance you where really something! Notice how small the lens is compared to the bulky size of the camera.

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From The Ralph D. Thomas PI Vintage Collection
THOMAS INVESTIGATIE PUBLICATIONS, INC.
NATIONAL ASSOCIATION OF INVESTIGATIVE SPECIALISTS, INC.
SPY EXCHANGE AND SECURITY CENTER
P O Box 82148, Austin, Texas 78708
Showroom: 9513 Burnet Road, Austin, Texas 78758
Phone 512.719.3595 Fax 512.719.3594
Email: RThomas007@aol.com

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Copyright: 2006, Thomas Investigative Publications, Inc. All rights reserved.
Thomas Investigative Publications, Trademark, 1981.
National Association Of Investigative Specialists, Inc, Trademark, 1986.
Spy Exchange, Trademark, 1999