Air traffic controller keyboard.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...d_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...r_keyboard.jpg
Previously:
https://www.homemadetools.net/forum/...495#post127855
https://www.homemadetools.net/forum/...145#post126065
https://www.homemadetools.net/forum/...466#post127716
https://www.homemadetools.net/forum/...295#post116282
https://www.homemadetools.net/forum/...2528#post76528
