hard to find and highly collectible single oversized victorian era c. 1870's antique american cast bronze interior residential or commercial window sash lock or fastener designed and fabricated by the p. & f. company, new britain, ct. the intact and fully functional window sash lock is comprised of bronze metal with a nicely aged surface patina. the self-locking window lock was advertised as "burglar-proof," according to an 1874-76 p. & f. corbin catalog. the intricate allover incised ornamental design is visually striking.