This appearance is basic to achieve using reactive spots. Maple is no longer hard to stain, when you react with the tannins inside wood. This was stained with Weatherwood Recovery stain sealed with Weatherwood Satin varnish (the only way to hold the colors).
link: weatherwoodstains.com/reclamation-reactive-stain.html
link: weatherwoodstains.com/varnish-topcoats.html