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Saturday 4 November 2017 at 13:32
There are usually 3 serial number locations on Gottlieb's. There is another on the front near the coin door and the last one is inside, on the first support on the bottom of the cabinet, covered by a little index card with a blurb for the operator. If you pull the staples out and remove that card yo...
Source: http://pinside.com/pinball/forum/topic/why-is-my-serial-number-missing#post-4056652