Grass Model 6 EEG Amplifier Tube

An ecc83/12ax7 type, "selected" by Grass Instrument Company, Quincy, MA back in the days of yore... 

Tube for Desktop

For the tube audio enthusiasts out there, here's a photo of a Rowe 7025 tube (basically an RCA 12ax7 for Rowe juke boxes).
You can set this as a desktop wallpaper, and tile it for an interesting effect. 

Clint and Gus

 

The Seeds Are Missing

 

Leona and Sam