Following on from the previous post, it seems that US/UK banker’s boxes are similar to the German ones.
Assembling a bankers box – Youtube video. This isn’t quite the same as the German boxes, but a similar principle.
And Thomson Reuters legal blog has a post Why do they call them Bankers Boxes?
It seems that the inventor, Walter Nickel, sold these boxes to banks to store records. He sold the rights when he was called up for WWI in 1917 (did he survive?). The buyer, Harry Fellowes, named his company the Bankers Box Company. It later became Fellowes.
Legal stationery – the topic that keeps on giving.
Thanks to Tom West.