NC - FINE- All original finish 90% - 94% or better, some dings in wood wear commensurable with percent of finish. In working order.

PRF - PROFESSIONALLY REFINISHED OR RESTORED

OB - EXCELLENT- all original parts; over 80% original finish; sharp lettering, numerals and design on metal; unmarred wood.

NPRF - NON-PROFESSIONALLY REFINISHED/COLD BLUE, ETC.