The Holgate "V-wagon" (my term) is not completely identified. I have seen no advertising of Junior blocks or wagons between 1943 and 1947, inclusive. However, the V-for-Victory theme of this wagon is strong evidence that this is a WWII-era wagon. It matches the #352 of previous years in size and blocks.
The blocks are complete, as in the 1941 catalog, listed below. Unusually, there is no color variation in the oblongs or the squares.
5 Oblongs (red)
5 Squares (blue)
2 Doublongs (green)
2 Columns (yellow)
1 Gothic Arch (green)
1 Half Circle (yellow)
The nearby Kane Dairy was using a "Victory" theme in 1942 (see Kane Dairy half-pint round milk bottle, "Keep 'em Flying" (#2)).