This piece is being liquidated from the estate of a South Florida architect, we have several other pieces listed from this estate. This is an extremely rare, 1920s General Electric 16 exhaust fan with brass blades. The plate reads Alternating Current Fan Motor No. 34029 Type AG Form T1 Spec 271057-1 Volt 110 Cycle 60. We have included a photo of a 1924 General Electric Catalog. We have not had the fan installed and wired for testing, it is possible it could need maintenance after being stored for many years. Please let us know if you have any questions, we are here to help. Thank you for looking and have a great day!