I thought I might have found it, but I see the Enter key is wrong, having the ISO shape and not the AT shape. I thought there were pictures of similar keyboards here, so I searched, and I found one photo of a bunch of keyboards, some with black keys, some with white, some PS/2 and some USB, in woodgrain (but plastic) cases, with the brand name "ARON".
You can see in the photos here, though, that the keyboard in the film does have an Fn key on the left side, so it wouldn't need function keys.