Question on the dimension of crown of Longines Majetek

Hello gents,

Matt here. New to the OMEGA forums. I have just picked up a ref. 3582 recently. As I spotted out the crown of it is not original. I would like to know the size of the crown so I could find a replacement crown for it.
Would you gentlemen, who have Longines Majetek, kindly enough tell me the size of the crown? (I have already find the stem of cal. 15, all I need is the crown size.

Many thanks!

Here you can find che correct size http://watchexpertise.com/oldlonginespassion/Longines_Passion/tartarugone.html