The first sketch in a radio station opens and closes with shots of a clock. The time is first shown as being slightly before 2pm and ends just a little after 2:03pm; a period of around four minutes. However, the discussion between these two points lasts for exactly five minutes.
When the "balliff" enters the room in the income tax sketch, a piece of grey equipment can be seen in the bottom left-hand corner next to the filing cabinet. Possibly part of a camera, it's quickly moved out of shot.