Yamaha FG800J Solid Spruce Top Dreadnought Acoustic Guitar

Sweetwater

Acoustic guitar category, Natural wood finish on the body, Dreadnought body shape, Dark tortoise-shell pickguard (visually consistent with source)

Yamaha FG830 Acoustic Guitar

Banjo Ben Clark

Acoustic guitar category, Natural wood finish on the body, Dreadnought body shape, Dark tortoise-shell pickguard (visually consistent with source)

Yamaha FG800 Folk Acoustic Guitar

Bananas.com

Dreadnought body shape matches, Natural wood finish (light top, darker sides) matches, Dark headstock matches, Dark, teardrop-shaped pickguard matches, General design and proportions are consistent