We used to get a very varied assortment of pallets and shipping crates that came with the new machines in my last shop, due to the procurement system they came from all north and south hemisphere continents.
Some you could not knock a nail in, they had been drilled and bolted, some almost as fibrous as coconut husks but very tough, many were red woods, often with waney edges, like yours by the looks of it, the sawmill off-cuts I presume in country of origin.