OD - VERY GOOD- all original parts; none to 30% original finish; original metal surfaces smooth with all edges sharp; clear lettering, numerals and design on metal; wood slightly scratched or bruised.

WW - WOOD IS WORSE FOR THE PERCENT FINISH RATING GIVEN

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