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Description
From Gerald F. J. Tyne, with his numbering #6030 and #6031. Two different views of oscillions of 1916-1917 vintage. Handwritten notes on reverse: 1) Oscillions of 1916-1917 vintage - side view. Same as in #6030. 2) Oscillions of 1916-1917 vintage - front view. Tube at left is 250 watt input rating, that at right is 500 watt input.
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