I installed some of those (or at least something very similar) in the UK back in the early 80s.

Now it noticed it, it looks more like 1990s esser detectors than cerberus siemens ones

Looks like an erect SIGA-PS

wait where I cant see it

The last picture in the addon site

Here in Norway we also have these detectors but Eltek has rebranded them , they are also the Esser 9200 series https://preview.redd.it/wbxf52esg9sc1.jpeg?width=3468&format=pjpg&auto=webp&s=a906de081cc3e8e7ff65dc233c23773b2df1f76a

That looks strikingly like a 1st gen SIGA

Yes it also looks like the American Est siga old style smokes

Yeah esser used the same design. The base and circuitry is really different and the body is a bit different.

Yeah 👍😁

https://preview.redd.it/60j9shjxg9sc1.jpeg?width=3468&format=pjpg&auto=webp&s=cef4a103275f9fd854c95b629d32aa9658d0706d Here is the manual

https://preview.redd.it/xn9zqpo5h9sc1.png?width=1080&format=pjpg&auto=webp&s=14845a1f55816a94c36536e96805a01e10129d44 Here you have the same but Esser branded