Valid For: Austria

We had applied for a Schengen Tourist Visa on 19th November for Austria and we received our visas today. However, on the visa sticker, next to "Valid For", it is only printed as "AT" and not "Schengen Staten". Does this mean that we will only be able to visit Austria and no other Schengen country? In our application, we had stated that we would be visiting Germany as well and in fact, our return tickets are from Germany and we had shown in our itinerary that we would be spending 7 days in Austria and 4 in Germany. We had even shown train tickets from Salzburg to Munich as part of the documents submitted.

Edit: Missed out to mention that Visa Type that we have received is "C".