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.

Produced from 1863 to 1873. Special factory two piece cylinder and hammer alteration. Matching cylinder conversion numbers. Fixed sights. Brass trigger guard, smooth rosewood grips. Overall finished over minor pitting.