Imperial threads
Danny
Your Imperial threads have got a lot further from blighty than Germany. A few years ago I refurbed a mixing machine in my partner's factory. It is about 40-50 years old. I needed to replace some bolts, and my metric set weren't going to fit. After a little bit of investigation it turned out the machine was entirely Whitworth. I haven't met Whitworth since I gave up on British motorcycles in the late sixties. The bizarre part is they all have metric sized heads.
The building industry here is also standardised on Whitworth. I needed them when I replaced some guttering.
There's nowt so queer as folk.