- OCA - Open Traffic Systems City Association
c/o Stadt Frankfurt/Main Straßenverkehrsamt
Gutleutstr. 191 D-60327 Frankfurt
- OCA - Office
Theaterstr. 24 D-52062 Aachen
Tel: +49 241 500717
Fax: +49 241 500718
- Dr. Josef Kaltwasser, OCA-Office, Theaterstraße 24, 52062 Aachen
Entry in the register:
- The "OCA e. V." Has its seat in Frankfurt am Main and is registered under the number VR12378 in the association register of the district court Frankfurt am Main.
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