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

Manufactured in 1861-1863.

OC - FINE- all original parts; over 30% original finish, sharp lettering, numerals and design on metal and wood; minor marks in wood.

Manufactured from 1884 to 1895.

OE - GOOD - some minor replacement parts; metal smoothly rusted or lightly pitted in places, cleaned; principal lettering, numerals and design on metal legible; lightly scratched, bruised or minor cracks repaired; in good working order.

Manufactured between 1878 and 1892.

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.

Manufactured in the late 1800s and early 1900s.

OC - FINE- all original parts; over 30% original finish, sharp lettering, numerals and design on metal and wood; minor marks in wood.

Manufactured 1912-1935.