Like an 1800 I have from the same period, this board has the modern windows logo, but pre retool blacks. They aren't bad, they are fairly stable, but they would clearly improve with use. Despite using dual PS/2, the rollover is acceptable, and an AT and 'RS 232' adapter are included.
Both the box and the board are marked G80-11900LTMUS-2/05, but the stems are identical to a loose black switch I had from a scrap 1800 PCB from TKC. The date code is Z47, which places it at the tail end of 2013