Signed by Lloyd Loar March 31, 1924 manufacture date (traditional estimates)
1924 shipment date, according to Spann's Guide to Gibson
Mandolin, Style F5
Factory order number unknown
The instrument has a Virzi tone producer, but the serial number is unknown
Fern Loar, very nice condition.
Appeared on the Antiques Roadshow, presented by Fred Oster of Vintage Instruments in Philadelphia, PA.
Here's the PBS video from the Antiques Roadshow
Unrelated to the "Antiques Roadshow" instrument, an f5 mandolin with this serial number was reported as stolen Sept 10 2007, from Grand Canyon, AZ. The authenticity of the claim was called into question.