Mark I And Mark V Bumper Beeper Surveillance System 1960's, 1970's

Pictured above is the Mark I and Mark V bumper beeper surveillance system from the 1960's and 1970's. This was an era before the time of GPS tracking equipment. This system was used by Bill Mitchell of Mitchell Reports Investigations, LLC . It was really something for it's time. Bill Mitchell used these units on many surveillance cases. One criminal case busted a ring who was going around stealing hundreds of thousands of dollars in funds out of vending machines. Click here to read Bill Mitchell's story about The Septa Transit Authority Major Coin Theft Case.

The small boxes on each side of the photo where the actual bumper beepers that went onto a bumper of a target vehicle with magnetic mounts. The two boxes in the middle were the receivers which could be mounted in a surveillance vehicle much like a CB radio was done in those days. You had to have a lot of antenna on top of your car to make these units work.They had to be set at least 6 inches apart and attached either to the gutters or mirrors of the vehicle. The antennas obtained the left and right signal technology.They would basically tell you if a vehicle turned or if a vehicle was the the left or the right and give you somewhat of a range. If you had this equipment in the 1960's and 1970's, you had state-of-the-art top flight surveillance equipment. By today's standards, these nits were big, bulky and expensive. A set could set you back several thousand dollars, a lot of money in the 1960's and 1970's. Compare that to stuff like today's Trimtrack GPS Ultra Advanced Unit or the TinyTraK GPS Data Logging System or the Livetrack GPS system.

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From The Ralph D. Thomas PI Vintage Collection
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