I’ve said all this before, and the generally accepted date for the transition from nickel to chrome is 1930, BUT it ain’t that simple because Scott’s suppliers were using chrome piecemeal before then. For instance the damper star washers and links on Webb forks, some Binks Three-Jet carburettor parts, Andre damper bits, and so on. Another issue is that the factory would use remaining stocks of nickel plated stuff years later ! I don’t like the look of a mixture of nickel and chrome, and a ‘concours’ judge not familiar with Scotts could well turn up his/her nose at the mix.
Radiators are another matter ! I wish I knew when they changed to chrome, certainly well after 1930….