I did find a manual for the later model that said that the single aperture is f12.5. So I would guess that the aperture on my version would be 12.5 for the larger and maybe f9.5 or f8 for the smaller. The single shutter speed is 1/50. The lens is a 70mm doublet. It uses 620 film which is no longer made. However if you have an empty 620 spool you can roll 120 film onto it and it will work fine.
So the Beacon Two-twenty-five is a very simple camera. To me its main distinction is its wonderful molded bakelite body. It is one of the few cameras that I found myself wanting just on the basis of appearance. And I think its main value will continue to be that I enjoy looking at it. The Beacon Two-twenty five I think is a little above average in its class in picture taking, however so far I haven't used it much for that purpose. The Beacon Two-twenty five did do me the service of providing a name for this blog. I am not good at naming things so when I had to type in a name I looked at this camera sitting on the shelf decided to use Beacon 225. And helpfully the Beacon Two-twenty five gave me the subject for the first post here.
Here are a few images in the Beacon Two-twenty five Gallery
Here are manuals for the Beacon Two-twenty five and the Beacon II:
Found this after making the post. It is an ad from the 1955 Photography Directory.