I downloaded the B&W "Clappton Box" catalog page directly from the German website, and the net weight is listed as 8.25 kg (18.2 lbs). What I don't get is the outer dimensions listed, which are 700 x 640 x 330 mm (27.56" x 25.2" x 12.99"). When I measure the outer dimensions of my case, I get exactly 25" x 25" x 12".

I did notice the "ART.-NR." in the catalog is 96800, and the tag that came on my case is 96006, but I thought that difference was just the modification to eliminate the combination lock and add the Velcro straps.

I believe the 23 pounds listed on the Calhoun website is the gross weight (including the cardboard shipping carton) which is 10 kg (22.04 pounds) on the catalog page.