NOS Shimano DuraAce 7400 UG Hubs with 12-21T  7 Speed  Cassette 32H 100, 126mm
The rear hub may have been laced at one time and may have been ridden. There are no marks on the cassette splines.
The front hub has never had spokes installed.
Includes the cassette. The smallest cog is a very desirable 12t and the largest is 21.
The smallest cog holds the cassette in place. This was before the outer Lockring became standard.
Cassette looks like it was ridden but not much at all. The last 2 images show the cassette after cleaning in an Ultrasonic cleaner.

Yes, I am aware this is not the correct box for 7 speed hubs. The box for the 7 speed cassette appears correct.