what make this happen ? both front and back of the case screw on fine but the shield is out of wack
all help is appreciated bob

I read somewhere that the case backs were initially offset a bit so that as the case was serviced a few times it would slowly wear and line up. Most of the ones I have seen go past the six as they are older and worn. Kind of like setting a watch that is running fast a little behind so that by mid week it will be on time and end week a little ahead. My 2 cents.

Im with Don on this one,your watch case might be 100
years old so the threads are worn out and the trade mark is not lining straight in case seen it befor .

if the case back needs to be turned a little bit clock wise to line up,i have a method to fix it.if it is past where it should be clockwise,then it is very hard to get it to line up..

Victor - Please do tell us your method for aligning the rear cover when turned clockwise, so it will line up. Very interested in learning your method.

but why play with it when no one can see it unless you carry empty case in your pocket

If case back is before the 12 o'clock position [I don't use or say 6 o'clock position], then lay the case rim back flat on a sheet of Emory paper and 'sand' it slightly back and forth 8-10 times, then screw it back on and see if you made any progress. keep doing this till it fits straight up and down. CAUTION be careful when you are close as once it goes past the straight up-down position, there is no fix to get it back !!

regards,
bb

The case's I have had with that problem where put-together and the serial did not match

I use a full sheet of automotive sand paper on a true flat surface with the grit facing up. about 600 grit and then place the rim of the back cover on it and rub it back and forth a few times and then try the fit..exactly the way Buster does it but with a different paper..i am sort of partial to the automotive sand paper because I am a retired auto body man..now they are called auto body technicians..same thing,different names..