That's a wonderful catch, especially for a first Patek.
Btw, I see the picture as a label but not in your post anymore: once you use the uploader, you then have to click on the "Display standard size images" next. This will paste the picture into your post's text place.
I don't have a 27 AM 400 picture to share but will be delighted to admire them from you and other members.
Cheers, Mark