Seems that it's...4 new variations to document !
Main variation 34A-B2-1 was already on the page, showing the size 2 box (Variations 34A-B2-1a and 34A-B2-1b). The size 3 boxes shown on the site is actually one of the two main variations without the lettering on the side of the model (34A-B4-2a and 34A-B5-2b). Turned out there is a second main variation that does not show the lettering on side of the vehicle and I will name the two detailed variations as 34A-B4-3a (B4 box) and 34A-B5-3b (B5 box). This variation is slightly different from the one illustrated on the site as it has the right number a bit further from the model and the model is slightly away from the left of the scroll.
The box that does not show the lettering on the side has a background, while the other one does not.
Now for the variations that show the lettering on the van :
- first has the model further to the right of the left part of the scroll, with a larger "N" on the right and closer to the model 34A-B4-4a, 34A-B5-4a
- second has the model bumper very close to the left part of the scroll, a smaller "N" on the right and further from the model 34A-B4-5a, 34A-B5-5a
I will list 2 variations for each of them for B4 and B5 types.
For the C box, the same pattern as the B box exist. Model can be found closer of away from left end of scroll and right "N" is larger of smaller.

- 34A-BBoxB2B3.JPG (26.44 KiB) Viewed 1966 times
34A-B2-1a and 34A-B2-1b

- 34A-BBoxBackgroundNoWritingNumberClose.jpg (23.44 KiB) Viewed 1966 times
34A-B2-2a and 34A-B2-2b

- 34A-BBoxBackgroundNoWritingNumberFar.jpg (21.52 KiB) Viewed 1966 times
34A-B4-3 and 34A-B2-3b

- 34A-BBoxNoBackgroundWithWritingNumberClose.jpg (26.3 KiB) Viewed 1966 times
34A-B4-4a and 34A-B2-4b

- 34A-BBoxNoBackgroundWithWritingNumberFar.jpg (24.68 KiB) Viewed 1966 times
34A-B4-5a and 34A-B2-5b

- 34A-CBoxNoBackgroundWithWritingNumberClose.jpg (24.04 KiB) Viewed 1966 times
34A-C1-1a

- 34A-CBoxNoBackgroundWithWritingNumberFar.jpg (25.5 KiB) Viewed 1966 times
34A-C1-2a
That's a total of 7 main variation for 34A and 14 in all !
Pat