RARE EARLY 1800s RICHARDSON & CO OCTAGONAL SCALE CARPENTER'S FOLDING RULE

1 3/8" wide. 2 foot, 4 fold. Features 'E' and 'M' octagonal scales. Alignment pins are intact with tight hinges and the rule lines up straight with no spring. Uncleaned as found. Fine overall condition for an almost 200 year old rule noting some staining on the boxwood body inside near the center hinge. It looks as though it may clean up reasonably though. I'm not aware of this exact configuration being made by Stanley or the like. 

Richardson & Co. operated from 1830 - 1843. Very uncommon Middletown, CT maker. Additional information can be found here.