Excuse my English. I was confused about the same thing at the start. There are two dilutions/concentrates of HC110 one in USA one in Europe. I bought a bottle in the UK recently and it was the same concentrate as the American.

The bottle will be 1 litre and the label will have 1+31 (B) stated as the B dilution. If this is the case then you have the American concentrate. I also think that they may have stopped the European dilution now.

This English language HC110 page is the place to look:

http://www.covingtoninnovations.com/hc110/