18238 DD Assistance

[dbphotos]

I just received the "new to me" 18238 that I purchased. Everything looks good, except when I set the time as I wind the hands there seems to be a "skip" in the winding stem/crown. I am assuming this is not normal. The day and date set just fine. The time sets fine it just has this "skip".

I will take this to my local watchmaker to look at but any idea as to what I should be looking at?

For reference:

Model #18238
Serial # E446xxx
Clasp #8385
End links #55B

Thanks!