Signedon top of ruler: Armstrong 12ths Charrette item number 281908 / PERKINS & WILL
on base of ruler: Made in England Charrette item number 281908
FunctionThe architects' scale provides the user with a variety of different scales with which to easily convert real-world measurements while making architectural plans.
ProvenanceLionel Spiro, Brookline, MA; Gift to CHSI, 2014.