Do you have the owner's manual? This online manual from Airstream may cover your AS -- not sure. Coincidentally we had a 1985 25' back in the 90's!
https://www.airstream.com/wp-content....085c.arc_.pdf
The Electrical System starts on page T-1. [PDF p. 66/80]
On p. T-2, it says the 12-volt circuit breakers automatically reset.
On p. T-3 at the bottom, the diagram indicates that your 12-volt panel is in the front. Those fuses [circuit breakers] are -- IMO -- included in the panel you show in the first photo, and they reset themselves per p. T-2 sentence above. The diagram on p. T-6 shows the amperage for each 12-volt circuit in this panel, and it looks like yours in the first photo.
If the above manual is not the right one, you can check others at the main Airstream site, under the "Service" menu item at the top right, and "Manuals" in the drop down menu.
https://www.airstream.com/
Although this manual refers to a Service Manual regarding electrical problems, I can't find such a document.
Good luck!
Peter