You spot the crate planked with 1/2˝ quartersawn, spalted sycamore.
As a side note, I took several of these down to level with the Veritas low-angle jack, which made quick work of it with thin full width shavings and no tear-out when used across the grain. I have not cambered it’s iron, as I use it for shooting primarily but it did the preliminary work handily and with minimal waste in thickness. All drum-sanded to 100 grit, jointed on one edge.
With cup and wind on some boards I ended up with thicknesses between 1/4 and 7/16th, and we’ll see what tomorrow will bring once things are rested, but at bottom line there will be some interesting shop-made veneer if nothing else. Thanks crate-makin’ guy wherever you are.
-- "Bordnerizing" perfectly good lumber for over a decade.