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Author Topic: Ernst Plank 520 or 520/1 “Hercules”  (Read 945 times)

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Re: Ernst Plank 520 or 520/1 “Hercules”
« on: January 13, 2021, 12:56:54 pm »
The catalog pictures look like your older fill hole.
The newer one looks like a safety valve, some what, Wilescoan.
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Tommy

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