I'm glad I found this site. Have been struggling to find information, especially repairers, who can tackle my car radio issue. I purchased a secondhand MGA 1600 and rebuilt it to as close to original as possible. One of the items it possesses is an Astor diamond dot push button radio. When I bought the car in 2022, about the only thing working was the radio. After replacing the motor, fixing the brakes, doing up the suspension, recovering the upholstery and ... I think you get the picture, I'm now left with a radio that no longer works.
I checked the speaker (4ohm) and it measures 3.6ohms on my multimeter, so I am assuming it is still functional. The only identification on the metal case is a D 17130 on the main case. I worked in the repair department of Astor when Sir Arthur Warner was the CEO in South Melbourne. It's another reason why I want to resurrect this radio. However, apart from a very very faded 'Quality Assurance' stamp with an unreadable date, nothing else I can see identifies the model. It is a push button, with two transistors on the top, inset.
If someone tells me how to go about posting photographs, I will do so.
Being in Melbourne, the lack of professional repairers for such an ancient piece of history has led me to throwing myself on the mercy of your members. If anyone out there can help, it would be greatly appreciated.

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Have a search here:

https://www.kevinchant.com/astor--air-chief--eil--diamond-dot.html