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@saltorito Reminds me of the Soviet 25 mm "electronics inch" which made Western replacement components *almost* fit:
https://en.wikipedia.org/wiki/History_of_computer_hardware_in_Soviet_Bloc_countries
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@saltorito People called it the "metric inch", but the actual metric inch is the modern 25.4 mm inch.
Fun anecdote please don't fact check:
When time came to standardize the inch, the British and US inches were of course slightly different. One was slightly longer than 25.4 mm, one slightly shorter. 25.4 mm was a reasonable compromise.
Now people were worried they would have to throw away all their measures and buy new 25.4 mm measures. But it turned out they had all been using Swedish measures, which were already 25.4 mm to be able to sell them to both markets and be accurate enough.