Seems an odd way to trigger a panic system. I would expect something much easier to trigger. Could you remove the screw in the middle, take the cover plate and take another photo of the internals? The knob above the red light, looks like a slider type volume control, can it be moved?
The style to me, suggests 1960's.
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local