diff --git a/pyerrors/correlators.py b/pyerrors/correlators.py
index 41c61985..9868a5c1 100644
--- a/pyerrors/correlators.py
+++ b/pyerrors/correlators.py
@@ -402,7 +402,7 @@ class Corr:
 
         if plateau:
             if isinstance(plateau, Obs):
-                ax1.axhline(y=plateau.value, linewidth=2, color=plt.rcParams['text.color'], alpha=0.6, marker=',', ls='--', label=plateau.__repr__()[4:-1])
+                ax1.axhline(y=plateau.value, linewidth=2, color=plt.rcParams['text.color'], alpha=0.6, marker=',', ls='--', label=plateau.__repr__())
                 ax1.axhspan(plateau.value - plateau.dvalue, plateau.value + plateau.dvalue, alpha=0.25, color=plt.rcParams['text.color'], ls='-')
             else:
                 raise Exception('plateau must be an Obs')
@@ -451,7 +451,7 @@ class Corr:
             else:
                 content_string += str(i + range[0])
                 for element in sub_corr:
-                    content_string += '\t' + element.__repr__()[4:-1]
+                    content_string += '\t' + element.__repr__()
                 content_string += '\n'
         return content_string
 
diff --git a/pyerrors/pyerrors.py b/pyerrors/pyerrors.py
index 65613ee8..5b0dfb95 100644
--- a/pyerrors/pyerrors.py
+++ b/pyerrors/pyerrors.py
@@ -474,14 +474,17 @@ class Obs:
 
     def __repr__(self):
         if self.dvalue == 0.0:
-            return 'Obs[' + str(self.value) + ']'
+            return str(self.value)
         fexp = np.floor(np.log10(self.dvalue))
         if fexp < 0.0:
-            return 'Obs[{:{form}}({:2.0f})]'.format(self.value, self.dvalue * 10 ** (-fexp + 1), form='.' + str(-int(fexp) + 1) + 'f')
+            return '{:{form}}({:2.0f})'.format(self.value, self.dvalue * 10 ** (-fexp + 1), form='.' + str(-int(fexp) + 1) + 'f')
         elif fexp == 0.0:
-            return 'Obs[{:.1f}({:1.1f})]'.format(self.value, self.dvalue)
+            return '{:.1f}({:1.1f})'.format(self.value, self.dvalue)
         else:
-            return 'Obs[{:.0f}({:2.0f})]'.format(self.value, self.dvalue)
+            return '{:.0f}({:2.0f})'.format(self.value, self.dvalue)
+
+    def __str__(self):
+        return 'Obs[' + str(self) + ']'
 
     # Overload comparisons
     def __lt__(self, other):