Well, here's the review.
They are indeed as advertised. Mil-Spec Ammo Cans with no markings. Brand spanking new.
Here's what the box looked like:
While the padding on the top of the ammo boxes was sufficient, there was open space in the box ... as shown in the bottom portion of the picture. No visible damage, so I can't necessarily find fault:
Here's one of the ammo cans pulled from the rest. There was little wiggle-room between the cans.
Here's what it looked like with the bubble-wrap removed:
Another aspect of the same ammo-can; the gasket appears to be new:
And here's a close-up of a front corner:
I'm satisfied with this purchase. No fuss, no muss ... and it matched (or exceeded) my expectations. As a previous purchaser, I'm on their mail-list. It seems like I get at least one message per day, most of which go right into the trash.
The ad for these was definitely 'wheat in the chaff' ... leastwise for me.