The Esco Hinge. Biddeford, ME.: The Ensign Stamp Co., November 1934

The Esco Hinge. Biddeford, ME.: The Ensign Stamp Co., November 1934, Volume: Gilbert A41. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525846 Accessed December 25, 2025.