From which road sign onwards may you not exceed a permissible maximum speed of 60 km/h?

This road sign (choice 1) is a regulatory speed limit sign used in Germany. It indicates that from this point onwards, you may not exceed the maximum speed of 60 km/h. The red circle with the number inside is a clear restriction — you must comply with it until a sign indicates otherwise.

The second sign means the end of the 60 km/h speed limit, lifting the restriction. The third sign, which is blue, is a minimum speed sign, meaning you must drive at least 60 km/h if conditions allow, which is different from a maximum speed limit.

So, since the question asks from which sign onwards you may not exceed 60 km/h, the correct sign is the first one because it explicitly sets a maximum speed limit.