How to Determine the Movement of a Mark XV

Hello IWC community,

I have a question for you. I've attempted searches and found a lot of great information, but it's just not exactly what I'm looking for.

After many years of Rolex ownership I purchased my first IWC this week. I found a very clean Mark XV on a bracelet (not the beads of rice style) and couldn't resist. The bracelet is so comfortable and well built - it's everything I wish my Rolex bracelets could have been.

In any case, I know the Mark XV came equipped with two movements depending on the date of manufacture. I'd like to figure out which movement my watch has. I have the box and all papers, minus the original receipt. I'm not seeing the caliber number on any of my paperwork. I know I could order an extract from IWC but it appears they want the number off the movement, and I'm loath to crack a well functioning watch.

Is there a way to determine the caliber number based on the numbers on the case? Should the caliber number be listed anywhere on the warranty card or other paperwork?

Warmest regards,
JP

Hi JP
The change from calibre 37524 to 30110 was effected between case numbers 2900000 and 3000000. If your case number is below 2900000, you have a 37524, above 3000000, you have a 30110. Between these numbers, you can have either.
Leo

Hello Leo,

Thank you very much for your kind reply! My case number is 283XXXX so it looks like I have the older movement.

Warmest regards,
JP

Congratulations on your redemption!

Cheers from Isobars.

Is is n't this great. Two new forum members, one asks a question and the other provides the answer, boom! There are knowledgeable people lurking around this forum. Now all we need is the Cellar to give his thumbs up to the answer and we can all rest and chill out for the holiday weekend!

I have no reason to doubt what Leosweenypod has posted as the answer, but I will say

1) I have not seen such information available anywhere from any reliable source
2) I do not believe that IWC has disclosed such information

The information may be correct --I suspect it is-- but from an journalism perspective there is no confirmed source. It's one of the "issues" with the Internet.

Hi Michael, It was my first post to the forum and I realise now that members need to be confident in the sources of information.
I have been workshop manager for IWC UK for about 12 years. Part of my job envolves diagnosing and authenticating around 200 IWC watches every month.
Through this process you quickly associate movements and serial numbers.
Good luck
Leo

Well I think that we can take that as a professional witness statement.

Does the different movement also coincide with the change in dial. The older version being the T SWISS MADE T dial and the later version being non T ?

Hi Andrew,
The EU ban on imports of tritium on dials was phased in from the end of 2003 and IWC quickly changed to superluminova.
This was well before IWC used the 30110 and not at all related.
Leo

If I am not mistaken there are many IWC dials having "no T" well before 2003. ie I am suggesting that IWC were using superluminova well before 2003.