Good news is - I've used these no-mortise hinges so many times, I could probably install them in my sleep. I like everything about them - the color, their low profile, and the ease in which they install.
But - even though technically, a mortise isn't needed for these, I chose to cut a small, shallow ones, so that the lid would sit perfectly flush with the bottom. If I didn't, the lid and the box bottom would have a small gap in between them.
Who can live with that?
I roughed the mortise out on my tablesaw, using the fence to cut it an equal distance from each end of the box.
and a sanding block.
Here is the mama bear bench on the right, and the baby bear bench on the left.
After a little more sanding, there are just two things left - add the coin ledge inside, and then oil the entire piece.