Since recently finding a few beautiful old folding rulers, I've had an eye out for more; they are just such a treat to hold and use, and if you, like me, do a fair amount of measuring, they are also very handy! This one was made by Stanley and is model number 68; 24 inches fully unfolded and made of boxwood with brass hinges and ends. The numbers are nice and large and easy to read, and even brighter on the interior side.
Folded up, it measures 6 3/4" l x 1" wide x 3/8". Very good condition; I have not touched the brass or wood but it might polish up a bit.