manufacture date (traditional estimates)
1941 shipment date, according to Spann's Guide to Gibson
Mandolin, Style F5
Factory Order number: 4091-G-4
Fleur-De-Lis, stamp no. 4091-G-4.
Frank Ford: 1941?
From Darryl Wolfe.
Darryl Wolfe's F5 Journal is the authoritative work on the subject of Loar-signed and later Gibson mandolins