How Old Is My Bridgeport Milling Machine? – Blue Chip ...
Usually, in the front of the knee by the serial number, you will find a "BR" logo. A 12-BR will indicate 12 inches of table travel. You will find this on most J heads. A "BR" with no numeral will indicate that 9 inches of travel (an early model). I will update this list as info becomes available.
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