I noticed your's has a date of 1948. Seems odd that a dial that new would still have that mercedes mount and the loud clicking. Also I think your number plate is newer, not original. The original number plate on mine had some cracks, so I put a newer one on, but saved the old plate. The numbers are slightly different on the older plate, especially the 9. I don't know what the progression was on the number plates, but the old one on mine reminded me of the numbers on a mercedes dial.
Also, mine makes the loud clicking on the wind, not the return.