See my answer to Ruckdee, above, you will have the opportunity to compare in pictures...
And yes, it could go into a GT case, ginven the dimensions of the movement.
The death of the GT case has been programmed years ago, my friend.
But I must admit that I find some appeal and interest to the Grande Reverso UT case, even more than the " 976 ".
Good or bad? It will all depend on everyone's taste.
The Vintage are still there, for the Schtroumph Grincheux. 
Best, Christian, and thanks for sharing your thoughts.
Nicolas