Here's a view of the back of the headstock looking down the rear of the neck with a close up of the grain. It's difficult to find the joins with a grainy wood like Tassie Oak.
I bet you those "Mahogany" Epiphones made from a "secret source timber" are this wood - it's not in short supply.
The neck rings like a bell when rapped with the knuckles.
It's straight! The steel rule balances on its edge.