diff --git a/kalibrierschein/IK-2015.clo b/kalibrierschein/IK-2015.clo
index cfcda94e773c84e2696119ba93874ca17b4135ee..400c3d2e8957517ce06a4d1f96c9f403d0d15611 100644
--- a/kalibrierschein/IK-2015.clo
+++ b/kalibrierschein/IK-2015.clo
@@ -24,7 +24,7 @@ footskip=0bp,
     %------------- Kopf ------------
     %%%\put(69,783){\parbox{\textwidth}{\huge\bfseries\ks@PTB}}
     %%%\put(69,760){\parbox{\textwidth}{\large\bfseries\ks@BSuB}}
-    \put(68,754){\includegraphics[width=308bp]{PTB-logo-KS-2015.pdf}}
+    \put(68,754){\includegraphics[width=308bp]{PTB-logo-2015.pdf}}
     %%%\put(287,680){\includegraphics[width=62bp]{Adler.pdf}}
     \put(252,640){\normalfont\huge Kalibrierschein}
     \put(260,622){\normalfont\itshape\large Calibration Certificate}
@@ -135,7 +135,7 @@ footskip=0bp,
   \begin{picture}(0,0)
     \unitlength=1bp %
     %%%\put(-1,28){\parbox{\textwidth}{\normalfont\huge\bfseries\ks@PTB}}
-    \put(-1,-5){\includegraphics[width=308bp]{PTB-logo-KS-2015.pdf}}
+    \put(-1,-5){\includegraphics[width=308bp]{PTB-logo-2015.pdf}}
     \put(-1,-35){\parbox{\textwidth}{%
       \normalfont\small
       Seite~\thepage\ zum Kalibrierschein vom~\ks@certificateDate,
diff --git a/kalibrierschein/KK-2015.clo b/kalibrierschein/KK-2015.clo
index 43bf454c2f204b30b77f933f2ab54fbaff41f99f..f4914f0b0447e8736a76160510b51e0fa123027e 100644
--- a/kalibrierschein/KK-2015.clo
+++ b/kalibrierschein/KK-2015.clo
@@ -24,7 +24,7 @@ footskip=0bp,
     %------------- Kopf ------------
     %%%\put(69,783){\parbox{\textwidth}{\huge\bfseries\ks@PTB}}
     %%%\put(69,760){\parbox{\textwidth}{\large\bfseries\ks@BSuB}}
-    \put(68,754){\includegraphics[width=308bp]{PTB-logo-KS-2015.pdf}}
+    \put(68,754){\includegraphics[width=308bp]{PTB-logo-2015.pdf}}
     \put(287,680){\includegraphics[width=62bp]{Adler.pdf}}
     \put(252,640){\normalfont\huge Kalibrierschein}
     \put(260,622){\normalfont\itshape\large Calibration Certificate}
@@ -135,7 +135,7 @@ footskip=0bp,
   \begin{picture}(0,0)
     \unitlength=1bp %
     %%%\put(-1,28){\parbox{\textwidth}{\normalfont\huge\bfseries\ks@PTB}}
-    \put(-1,-5){\includegraphics[width=308bp]{PTB-logo-KS-2015.pdf}}
+    \put(-1,-5){\includegraphics[width=308bp]{PTB-logo-2015.pdf}}
     \put(-1,-35){\parbox{\textwidth}{%
       \normalfont\small
       Seite~\thepage\ zum Kalibrierschein vom~\ks@certificateDate,
diff --git a/kalibrierschein/PTB-logo-KS-2015.pdf b/ptbletter/PTB-logo-2015.pdf
similarity index 100%
rename from kalibrierschein/PTB-logo-KS-2015.pdf
rename to ptbletter/PTB-logo-2015.pdf
diff --git a/ptbletter/ptbletter-doc.pdf b/ptbletter/ptbletter-doc.pdf
index ca15578d8636ddd92cc07c13a86711893bf50aac..44b886c185fc8ead025800b6c954e71c9981ce27 100644
Binary files a/ptbletter/ptbletter-doc.pdf and b/ptbletter/ptbletter-doc.pdf differ
diff --git a/ptbletter/ptbletter-doc.tex b/ptbletter/ptbletter-doc.tex
index 6aea2987939cfdfacb90ada11087945a19f908eb..45c898f60c85b58718c3fec37a9558e41c3a0201 100644
--- a/ptbletter/ptbletter-doc.tex
+++ b/ptbletter/ptbletter-doc.tex
@@ -4,6 +4,8 @@
 ,twoside
 ,serif
 ,BLN
+,head1
+,visualize
 ]{ptbletter}
 
 \yourref{4711-0815}
@@ -52,6 +54,10 @@ Klassenoptionen:
   deutsche Rechtschreibung werden benutzt (Standard).
   \item \textbf{en}, \textbf{english}: Trennregeln für die englische Sprache
   werden benutzt.
+  \item \textbf{head0}, kein Kopf
+  \item \textbf{head1}, PTB-Kopf mit Logo (Standard)
+  \item \textbf{head2}, PTB-Kopf ohne Logo
+  \item \textbf{visualize}, Visualisierung interner Parameter (zu Debug-Zwecken)
 \end{itemize}
 
 \noindent Alle anderen Optionen werden an die intern benutzte Dokumentenklasse
diff --git a/ptbletter/ptbletter.cls b/ptbletter/ptbletter.cls
index e42700f78482649ee9638395ddf391fbb2adc176..e48754c9b43b61636b3f6eab680ec109390ed37e 100644
--- a/ptbletter/ptbletter.cls
+++ b/ptbletter/ptbletter.cls
@@ -16,7 +16,7 @@
 \newif\ifptb@serif \ptb@seriftrue
 
 \newcommand*\ptb@lang{main=ngerman}
-\newcount\ptb@head \ptb@head=2
+\newcount\ptb@head \ptb@head=1 %
 \newcommand*\ptb@tempa{}
 \newcommand*\ptb@tempb{}
 
@@ -151,14 +151,17 @@
 \addtokomafont{addressee}{\sffamily}
 \setkomafont{refname}{\sffamily\tiny}
 \setkomafont{refvalue}{\normalfont\footnotesize}
-
 \setkomavar{firsthead}{%
-  \begin{minipage}[b]{\linewidth}%
-    \sffamily\bfseries\huge%
-    Physikalisch-Technische Bundesanstalt\\[3bp]%
-    %%%\large
-    Braunschweig und Berlin
-  \end{minipage}%
+  \ifcase\ptb@head
+  \or% 1
+  \or% 2
+    \begin{minipage}[b]{\linewidth}%
+      \sffamily\bfseries\huge%
+      Physikalisch-Technische Bundesanstalt\\[3bp]%
+      %%%\large
+      Braunschweig und Berlin
+    \end{minipage}%
+  \fi
 }
 
 \setkomavar{location}{%