Birmingham. All are shown again.
It sounds like you are using the British values, so all is fine.
The Carnegie steel hand book of 1926 showed the following wire gage
sizes, in inches, and all wire had a design strength of 20 ksi
9ga= 0.148 12ga= 0.109 Birmingham Wire BWG or Stubs Iron Works
9ga= 0.114423 12ga= 0.080808 American Wire or Browne & Sharpe
9ga= 0.1483 12ga= 0.1055 American Steel & Wire Co formerly
Washburn & Moon
9ga= 0.145 12ga= 0.105 Trenton Iron Company
9ga= 0.144 12ga= 0.104 British Imperial Standard Wire SWG
9ga= 0.1398 12ga= 0.0991 Standard Birmingham Sheet and Hoop BG
David Merrick, SE
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