Neither - it's A Carmichael Body on a Karrier Gamecock Chassis. It looks very different now! The rear ladder was added in the 1990's and has now been removed along with the rear step.
Added by Michael G on 13 March 2019.
Thanks Michael.
I like the fact that they maximized rear access. It is a lot safer to unpack items from the rear than from the sides, particularly in close quarters and/or in traffic.
A lot of US and Australian fire equipment are designed along these lines, and of course quite a lot of European and all Japanese pumps hang their hoses in carts mounted at the rear...
Added by Rob Johnson on 10 March 2019.