*** "Sorry, the ones with carved lines are no longer available. Please use the smooth-top ones instead!" ***

This is a brass knob cap for vintage Fisher tube amplifiers, models 400, 500B, 500C, 800B, and 800C.

It is made in China and is compatible with other vintage audio and video equipment.

The unit type is a cap and it is designed to fit most vintage Fisher models.

Please know that there are two kinds, one with a smooth top and one with a carved line. Please select them accordingly.