Physikalisch-Technische Bundesanstalt (PTB)
Represented by the President Prof. Dr. Joachim Hermann Ullrich

PTB Braunschweig:
Bundesallee 100
D-38116 Braunschweig
Phone: +49 (0)531-592-0
E-mail: info(at)ptb.de

PTB Berlin:
Abbestraße 2-12
D-10587 Berlin-Charlottenburg
Phone: +49 (0)30-3481-0
E-mail: info(at)ptb.de

Value added tax identification number/VAT-Nr.: DE811 240 952
ISNI: 0000 0001 2186 1887"