[1][2][3][4] Kohrs invented a rotary tattoo machine with main part an electric motor and an ink reservoir.

Kohrs completed his four years of military service as a regular soldier; his last active rank was Staff sergeant at the Aufklärungsgeschwader 51 of the German Air Force.

His machine was functionally similar to O'Reilly's except an electric DC motor, rather than electrified magnets, drove the needles.

[12][13][14] Kohrs tattooed Rio Reiser, Klaus Meine, Rudolf Schenker and other several notable musicians, artists and celebrities of the time.

[16] The speakers on the convention were Terry Wrigley, Peter Tat 2 Poulos, Diane Poulos, Don Ed Hardy, Bob Shaw (who spoke about the importance of using autoclaves and hygiene), Big Walt Kilkucki, Painless Jeff Baker, Dave Yurkew, Arnold Rubin and Jan Stussy.

[16] Kohrs, Streckenbach and Terry Wrigley (president of E.T.A.A),[21] were present in October 1980 at the first German Tattoo Convention at Frankfurt.

[24] In December 2016 he visited the exhibition Nailed to the Cross by PMA Tattoo Hanover[25] and November 2017 the 10. tattomenta Kassel.

From November 2019, to May 2020, the Museum für Hamburgische Geschichte showed a special exhibition on Christian Warlich with a section on Streckenbach and Kohrs.

The purpose of the statutes is realized by organizing scientific events and research projects on German tattoo history in an international context.

Since December 2015, Ole Wittmann is a postdoctoral scholarship holder of the Hamburger Stiftung zur Förderung von Wissenschaft und Kultur (Hamburg Foundation for the Promotion of Science and Culture) working on a research project on the estate of the German tattooist Christian Warlich (1891–1964) in cooperation with the Stiftung Historische Museen Hamburg/Museum für Hamburgische Geschichte.

[32] In 1981, Ulrich was approached about Streckenbach to Manfred Kohrs[33] in Hanover to be tattooed as part of an art project, the words "THE END" refers to an eyelid.

[39] The history of the association dates back to 1977, when Manfred Kohrs invited a number of tattoo artists established in Germany - including Horst Streckenbach, Edward Szustak "Tattoo Eddy", Herbert Hoffmann, Heinrich Dietz and Theodor Vetter, as well as Dietmar Gehrer from Switzerland - to an information meeting in Hanover.

[41] From 27 November 2019 to 25 May 2020, the Museum für Hamburgische Geschichte showed a special exhibition under the title Tattoo Legends.