Max Speed 45mph was the dash stencil on many Series military landys.
Not many people remember the dash stencil was part a road safety awareness campaign
conducted for the english speaking military-service-members of the world --
it used a popular tune by Rolf Harris (popular back in the 60s) with an accompanying wobble noise he made using a Land-Rover door skin..
Uncle Ho used to whistle it at work.
"Keep the greasy down, sport. Keep the greasy side down.
"Max Speed 45, Clive, don't go over that 'n stay alive.
"yeah Altogether now
"Keep the greasy down, sport, keep the greasy side down..."
[yeah, I know, one too many happy pills... ]