Editing Otto Rehberg (section)

== Engineering career in Narevaku ==
Rehberg emigrated to Argentina in 1947, sailing from [[Genoa]] to [[Buenos Aires]]. Jan recruited him there the following year at Fabio's request and paid for his onward sea passage to Narevaku. He joined Fabio's tank-design studies at the technical facility outside [[La Roche]]. Fabio set the military requirements and demonstrated maintenance problems, while Rehberg performed the detailed engineering calculations. Rehberg proposed technically necessary revisions, which Fabio accepted.<ref name="fabio-development"/>

When towing experiments revealed that the available vehicles lost traction on wet ground, Fabio asked Rehberg to investigate a tracked recovery tractor. They converted an industrial crawler into the Bergeschlepper 49 in late 1949. Its recovery of an immobilised military lorry prompted Rehberg to caution that this did not demonstrate an ability to recover a tank. During a further trial on 21 June 1950, he measured towing forces as the tractor recovered a heavily laden lorry. Fabio submitted the results to the [[Tanoanisches Waffenamt]].<ref name="fabio-development"/>

The two also began meeting outside work. Fabio invited Rehberg home in September 1950, when they discussed their lives in Germany, and they continued meeting socially.<ref name="fabio-personal"/>

Rehberg continued working on the PzKpfw-55 design after Jan approved funding for a complete prototype through [[Strobl S.A.]] in 1955, with Fabio leading the military project.<ref name="fabio-tank"/>

He died on 18 November 2005, aged 97.