7" Dewrance's Patent Vacuum Absolute Pressure Indication Gauge

7 Dewrance's Patent Vacuum Gauge for indicating absolute pressure. no.4025, Pat. Spec. 24577/09'

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7 Dewrance's Patent Vacuum Gauge for indicating absolute pressure. no.4025, Pat. Spec. 24577/09'
Science Museum Group
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7" Dewrance's Patent Vacuum Gauge for indicating absolute pressure. no.4025, Pat. Spec. 24577/09

Details

Category:
Motive Power
Object Number:
1936-358
credit:
Dewrance and Co.