|Covid-19|1:600 scale Wikipedia
The 1:600 scale is a modeling scale. Real vehicles are 600 times larger than their 1:600 toy or collectible model counterparts.
The scale is mostly associated with the Schabak and Schuco brands of model airplanes, which produce die cast commercial (and some military) airplane models on that scale. Airfix has ship models in that scale, and, also produced in the 1:600 scale, are military armor models.