My Altair has the NorthStar controller. It's one
card of TTL chips and
 uses a 5 1/4" drive. I'm fairly sure it uses 10 sector disks (same as the
 North Stars) but I don't it working yet so I'm not positive about the
 number of sectors. 
It's likely the same as the controller was used in a lot of systems.  It
was the first disk upgrade to my altair prior to retiring it.  Typically
if the drive box was bought from NS* the box would be the same blue as
altair.
Allison