WWII US dexterity puzzle - Keep 'Em Rolling for Victory

Handheld dexterity puzzle with dark red metal sides, glass top and cardboard background featuring the flags of the United States of America and United Kingdom in shields on the upper left and right. Underneath them is the name of the game and the letter 'V' with dark blue edges and slots into which small cylindrical pieces of dark blue painted timber can be manoeuvred.The scene below depicts tanks moving across a hilly landscape. There are a series of three dots (red, white and blue) with holes in the centre and then a horizontal rectangular slot with dark blue edges. The three dots and a dash represent the letter 'V' for Victory in morse code. There is a depiction of a large brown tank at the centre bottom and the words 'Made in U.S.A.' on the left below that.
There are three metal balls and three pieces of painted timber which need to be juggled into position to complete the puzzle.
The reverse of the game is rusty coloured cardboard.

As with most of these vintage dexterity puzzles, they have become harder to complete due to the warping of the cardboard base.

One of a series of handheld dexterity puzzles in the collection produced in the United States during WWII.