They did run with the snail totem but only rated as 20 tonners - even though the body is identical to the 30 tonner, would love to know the genesis of these- without the vac brake text. Undergear appears to be naked, but you'd never notice in fairness. The long steps tend to obliterate that view.
Mid build - please forgive the unfinished look.
The totem was on the upper left panel, and the "20 ton brake" text on the upper right with the number stencilled on the lower right hand panel. Works' stencil tests seems not to be present. I have a few photos from the O'Dea collection showing same with date - don't have them on the tablet here but will post tomorrow from the big rig.
Grey and black for the centre panel is an option for early running - late 70,s.
Lemme dig through a few snaps and see if any capture the undercarraige. R.