Siebe Gorman Vista Vision Mask
The Siebe Gorman Vista Vision Mask featured a large curved triangular window with central speech diaphragm and inlet. There were many applications, including SCUBA, rebreather, and the "Puretha" filter. This example has a corrugated hose that would be connected to a supplied air system, and was made by Siebe Gorman around 1960.
Similar masks in my collection: N/A
Manufacturer stamp on forehead "SIEBE GORMAN OF ENGLAND VISTA VISION"
Manufacturer stamp inside mask "SG"
Filter stamp and sticker top view "130587" "Remove bottom seal before use"
Filter bottom view
Filter side view "Puretha respirator Type C" "130587"