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===511=== | ===511=== | ||
<gallery> | <gallery> | ||
Tek 511 1.jpg | Tek 511 1.jpg | ||
Tek 511 2.jpg | Tek 511 2.jpg | ||
Tek 511 3.jpg | Tek 511 3.jpg | ||
Tek 511 4.jpg | Tek 511 4.jpg | ||
Vollum scope - Electronics Magazine April 1948.jpg | Vollum scope - Electronics Magazine, April 1948 | Vollum scope - Electronics Magazine April 1948.jpg | Vollum scope - Electronics Magazine, April 1948 | ||
Septad511.jpg|511 ad from September 1948 | Septad511.jpg|511 ad from September 1948 | ||
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===511A=== | ===511A=== | ||
<gallery> | <gallery> | ||
Tek 511a 1.JPG | Tek 511a 1.JPG | ||
Tek 511a 2.JPG | Tek 511a 2.JPG | ||
Tek 511a 3.JPG | Tek 511a 3.JPG | ||
Tek 511a 4.JPG | Tek 511a 4.JPG | ||
Tek 511a 5.JPG | Tek 511a 5.JPG | ||
Tek 511AD top 2.jpg | Tek 511AD top 2.jpg | ||
Tek 511AD top 3.jpg | Tek 511AD top 3.jpg |