I like your model, it’s well made!
If you wanted to improve it even more you might think of trying some different lighting- one of the things that keeps it from looking realistic is that everything is fully lit so much so the shadows look odd. If you look under the glasses they don’t have a shadow showing where they touch the desk and almost look like they are foating. I would also expect the window to have a bit of a reflection perhaps- something that shows there’s glass in there.
The textures could be pushed a bit too, if you want to push the theme further. If the top part of your record player is metal, consider painting rust on it. Here’s a wonderful tutorial by Andrew Price that I found mind blowing and I think you might find useful too: https://www.youtube.com/watch?v=37oBqhjDtBI
He really explains it, and it’s not just about adding rust anywhere, it’s about the thought behind where the rust goes. I’m seeing cobwebs and a scratched up box, but all the metal is shiny and new looking- I think that tutorial might help you add a bit of realism. You might consider other types of staining on the surface of the table, as imperfection can really add to making a scene look old and falling apart.
The last thing that stands out to me is that it looks like your wallpaper was done as a projection texture. Try unwrapping it. https://i.imgur.com/MuF0O7T.png Right now these streaks are a dead giveaway it’s a 3d model and detract from your scene.
Looks pretty good. Modelling is fine, AFACIT. The brass for the horn looks more like army paint than brass, so I’d suggest checking up on aged brass materials and/or textures. Old phonograph horns usually had more prominent seams where the sections join too. You could throw a ring around those to get the effect.
Also, If the thing has been sitting around long enough for spiders to make webs all over it, there would probably be more dust and dirt on the horn. Along with dead bugs and spoider shit. The usual. Just check any of your windows if you’re a bit slack on housecleaning.