201A tubes: I have 2 tubes with a green decal 'Chesterfield' and 1 tube with the decal 'Silver Domino'. Any idea who made them for who? Thanks

:201A tubes: I have 2 tubes with a green decal 'Chesterfield' and 1 tube with the decal 'Silver Domino'. Any idea who made them for who? Thanks

Hard to say since there were well over 500 different brands of 201/A tubes in the 1920's. The 201/A was the most commonly used tube of the 20's. Both are listed in George Fathauer's book "Radio Tubes and Boxes of the 1920's".
Steve

Thanks for help.