The small 6 is like that on all of the 113 odometers I have seen. There is no way to tell if the mileage has been changed if the person takes the time to line up the numbers. Changing the odometer reading is very easy I have done it several times on the 113 speedometers. I dont think the odometer reading is as large a gauge of condition as some may think in these older cars, there are only 3 real concerns and that is, condition, condition and condition and the odometer reading can be a part of it, so if you like to have low mileage on your car just pull out the speedo and take a few minutes with some basic tools and you can make it say whatever you want. I personaly only set the mileage to the last reading from the previuos speedometer and really dont like setting them back for unscroupulous reasons, however I have seen cars that had faulty parts and dealers just put in a new speedometer and the car starts out fresh and only detailed service records can reveal this. Again the odometer is just a clue and can be misleading, take the info for what its worth.