IBG Models Chevrolet C60S Petrol Tank

[Ilian Filipov]

Hi all,
Today a picture I've never seen before was found in the Canadian archive site.
It turned out that after all most probably the IBG tanker has the right to exist.
This one:



I have no idea why they stated on the boxart the cab 11 (with 12 grille, though!) Ford CMP (with bowtie, though!) as "Chevrolet", ask them. It is possible, though, there is Chevy in the box and cab 12 too, as stated on the box, I cannot comment the kit.
And this is the picture:


Source: http://collectionscanada.gc.ca/pam_a...81986&lang=eng
Please correct me if I'm wrong but I think this is cab 12 C60S.
A one-off prototype, perhaps?
Also, the caption says "IS C.W.T. petrol tender". What "IS" is for? Or this is a typo and they've had in mind 15 cwt? I would't be surprised if so, there are many incorrect captions in that place.
Cheers!