It's likely to be this:
PVD case with a polished steel bezel to replicate the look of a vintage speedo.
Eddie
60mph dial with steel case
60mph dial with PVD case a polished steel bezel
120mph dial with steel case
120mph dial with steel case and polished steel bezel
120mph dial with steel case and polished steel bezel (alternate dial)
It's likely to be this:
PVD case with a polished steel bezel to replicate the look of a vintage speedo.
Eddie
Whole chunks of my life come under the heading "it seemed like a good idea at the time".