When you have a normal 24 hour, analog face it shows 12 on top, 24 on the bottom, 18 on the right and 6 on the left (+ other ones between). If +x and -x would move with hour hand it would mean that either your timezone is changing (vs those cities you listed), or that timezones in those cities are changing.
Everyone is living in a time zone (for me it is now +2 UTC (+1 for Poland and +1 for summer time)) so on my watch, it should show my city (or the major city in my time zone) with its time zone (+2) on top; and if someone lives in London it should show 00 on top along with LON.
Do you get it?
If not let me know what timezone are you in, I will try to explain it from your perspective.