I have sold a few used pairs of these over the years and this pair were the best example I ever saw or heard and are now available.
The bass drivers have the Alnico magnets, they have metal horn flares and paper in oil capacitors.
(Not the inferior mark 2s with plastic horns and MDF cabs.)
They have always been stored meticulously by the owner.
This particular pair are in a higher grade of birch-ply than all the others I have dealt with which are usually mid to dark brown.
The main effect is that the sound is noticeably more focussed than usual.
Wonderful!