The Vintage Instrument Workshop — 1917 Gibson A4 Mandolin
1913 Gibson A4 Mandolin for sale at Mandolin World Headquarters...and Guitars: Gibson mandolins, Martin guitars, Gibson gui… | Mandolin, Banjo music, Gibson guitars
Catch of the Day: 1907 Gibson A-4 Mandolin - Fretboard Journal
Gibson Model A-4 Snakehead Carved Top Mandolin (1924) | RetroFret