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1909: Knowles Oxygen Co Ltd
Knowles Oxygen Co. Wolverhampton. Knowles Hydrogen
Knowles Oxygen Co. Wolverhampton. Knowles Hydrogen
Rec. Num. 1 of 4 Source: Flight December 11th 1909
For Free Hi Res Copy Email: Request Ad ID: 53267
1910: Knowles Oxygen Co Ltd
Knowles Oxygen Co Ltd For Constant Guaranteed Hydrogen
Knowles Oxygen Co Ltd For Constant Guaranteed Hydrogen
Rec. Num. 2 of 4 Source: Flight Mar 12th 1910
For Free Hi Res Copy Email: Request Ad ID: 3905
1911: Knowles Oxygen Co Ltd
Knowles Hydrogen As Supplied To The Clement-Bayard Airship.
Knowles Hydrogen As Supplied To The Clement-Bayard Airship.
Rec. Num. 3 of 4 Source: Aero February 1st 1911
For Free Hi Res Copy Email: Request Ad ID: 8656
1911: Knowles Oxygen Co Ltd
Knowles Oxygen Co. Hydrogen
Knowles Oxygen Co. Hydrogen
Rec. Num. 4 of 4 Source: Flight November 18th 1911
For Free Hi Res Copy Email: Request Ad ID: 53611