Symbol 5327 from IEC 60417 - Title/Meaning: Large focal spot Function/description: To identify controls or indicators associated with the selection of a large focal spot or the connections for the corresponding filament.
Additional information: 
Published in: Supplement G, 1985
Own work using: iso.org/obp/graphics/grs/72ac2fa0-b804-48e4-82cf-f0be9e861b9f 200.png
Vectorization:  Mrmw