1999-P Lincoln Memorial Cent Column

The bar on column #12 is just part of the design to make it look three dimensional. Looks like a cleaning removed some of it on the two areas above and below the design and left it looking that way. Probably a clash on the die made a cleaning necessary to remove the clash marks. It is cleaned and put back into use. The design there is very close to the height of the field and was just easy to suffer from a cleaning of the die. Fields are the outside edge of a die, the devices are sunk into to them, thus removing some field lines can affect low devices.

Youi have the right idea, but the wrong place. look at columns 6& 7, where the statue is. There you will find a varietuy of bars, and other anomilies. Good luck!
Dick