On the Philips N4307/4308 (and rebrands), there is a small plastic 'wall' in front of the right hand reel, in line with the left edge of the VU meter.
https://www.radiomuseum.org/r/philip...08_n_4308.html
Does anyone know what it's for? My best guess is that it's in such proximity to the right hand reel (when 7" reels are used) that it's some device to avoid tape spillage, somehow.