IWC Aquatimer IW354807

[timechecked]

my iwc aquatimer iw354807 has 23 jewels, same model has 21 jewels. what's the difference between the two? also, i learned that one or both of them has an inner soft cover, mine has none.

also, i opened and the movement has all the numbers and writings. could still be a copy? I paid $2,700.00 as used.also the crystal is very thick, is that normal? need help for clarifications. thanks

[WatchFiend1]

Try uploading some pictures for a better response