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Author Topic: Schoenner Lipsia by Leipziger Lehrmittelverlag - Poppet Valve  (Read 1526 times)

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  • Location: Rio de Janeiro
Re: Schoenner Lipsia by Leipziger Lehrmittelverlag - Poppet Valve
« on: June 06, 2021, 07:04:23 am »
Hi,

I once tried a calculation based on prices and salaries from around 1900, it turned out that a machine like this would take a weeks salary for a medium class worker.


Maurice
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