Rare & Interesting WW1 Gas Leak detector - Pastorelli & Rapkin Ltd - Orig case

Rare & Interesting WW1 Gas Leak detector - Pastorelli & Rapkin Ltd - Orig case (image 1/4)
Rare & Interesting WW1 Gas Leak detector - Pastorelli & Rapkin Ltd - Orig case (image 2/4)
Rare & Interesting WW1 Gas Leak detector - Pastorelli & Rapkin Ltd - Orig case (image 3/4)
Rare & Interesting WW1 Gas Leak detector - Pastorelli & Rapkin Ltd - Orig case (image 4/4)
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This is an interesting early 20th century, WW1 period "Rapid" Gas Leak detector Patent: No 6058 by Pastorelli & Rapkin Ltd, 46 Hatton Garden, London. No: 1908. The instrument is principaly made of laquered brass and is of lovely quality. I have no idea of how the instrument works, it appears to have a filter at the bottom and a paper dial marked in percentages for explosive and non - explosive. The Instrument measures approx. 60mm in diameter and stands approx. 80mm high. It comes in its original leather case, which is severley damaged / worn and would need repaired. Any questions please feel free to ask.
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