Here is something you are not likely to see very often... if at all - the Nagra IV-S with its QGB adapter using AEG DIN platters.

This is the kit from Nagra T modified to fit the IV-S. The platters had to be reduced in diameter to fit this smaller machine, but they are still larger than the 10.5" reels.

The reason for this conversion was simple - much, if not most, of my tape collection is on AEG DIN hubs. As you can see it works very well.