Wanted Photo/Information on Heathkit GD-18/WD-5130 sirens

[Safetyman]

Trying to locate a photo or source of the original knobs used on the above sirens.

Thank you!
Bill

 

[Clarence H]

This is how the knobs looked on the one I had.
Microphone was different although.
Clarence

 

[shues]

Here's a larger version of the same photo that @Clarence H posted, and another from the same listing:

Those knobs look very similar to the knob on a Federal PA-300.

 

[Safetyman]

Thanks for the reply and pics. I have seen several types of knobs on other Heathkits (including an old HK catalog from 1976).