I'm looking at ordering a new crown for my old Caravelle divers watch but I can't seem to find the exact size I need. I got the tap size and the case tube size all good but the diameter of the crown is .10mm off from what is available. The size of the crown is 4.90mm but the closest available one is 5.00mm. The space around the case tube appears to offer 1.30mm of extra crown space but even with the original crown it seems pretty close. I'm wondering if I should order the crown that is a bit larger or go safe with the 4.50mm that they also offer.