Serial number location

Hi Everyone,
I've been following the forum for a while but this is my first post. A quick question that I hope will have an easy answer. I recently purchased an Aquatimer 2000 Ti - model 3536. I bought it from a reputable watch shop in the Phoenix area where I've purchased other watches in the past. It came complete with box, papers and the warranty registration card showing it had originally been sold by an authorized IWC retailer in Decembr of 1998. The card and the outer box show the serial number but, for the life of me, I can't find it engraved anywhere on the case of the watch. Would it be on the inside so that the case back would need to be removed to see it? I love the watch and any information you long time IWC owners could pass along would be greatly appreciated. Thanks!!

Hi,
I think here's the answer:
Serialnumber

Thanks for steering me in the right direction Tom. I appreciate the help.

Jim