25 vols.
Sanborn Map Company, pub. Insurance Maps of Philadelphia. New York, 1916-1927. Vols. 1-24, 26 (of 32 in 29). Folio, contemp. cloth; worn, a few spines defective. Index & map sheets; with additions & indices to 1948 in most vols. Light to moderate smoke soiling to title pages & indices, other scattered light soiling & occasional creasing & minor chipping. A few map leaves loose.
Offers a detailed representation of the construction of most of the city of Philadelphia.