This is a Marcus Bonna clarinet case. It’s holds Bb, A and Eb clarinets. Although, it’s not necessary to hold the Eb in this case as well, then it acts as a normal double clarinet case. I bought this new from Howarth of London. I’ve used it for a few years so it does have general cosmetic wear and tear. As you can see on the photos, particularly to the straps of the clarinet and front of case. It’s fully functional and keeps the clarinets nice and secure. The case is stylishly compact but also has two extra compartments, one large one for music and another smaller one at the front. Only the case is for sale, the photo including the clarinets is just to demonstrate how the instruments fit.
eBay