https://www.armaturen-wolff.com/catalogue/AW-384-Storm-Valve-DIN-87101.html
AW 384 Storm Valve, DIN 87101 - ARMATUREN-WOLFF
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https://www.smallscalehobbies.com/einheits-diesel-kfz-62-truck-wespe-87101-new-1-87-scale-unfinished-kit/
Einheits Diesel Kfz 62 Truck Wespe 87101 New 1/87 Scale Unfinished Kit - Small Scale Hobbies