Need help with identifying

Hello, I inherited this IWC watches from my Grandfather. And I would really like to know more about this watch especially how the original band looks like.

goo.gl/photos/51hFBa6ABhuRrp2B9

thx for your help

you will need to post pictures here and if possible more clear ones of the dial and crown too.

I have a similar one, it's late 60 and early 70's Cal. 89. I don't know about the original band, when I got mine service IWC placed it on black 18mm calfskin strap. I was told though that originally it was on black alligator strap. But cannot confirm that accurately.

Dear Members, I'm new here. I currently plan to buy my first IWC vintage watch and would need some help from you. I found the serial number at "dateyouriwc", it is from 1962 but cannot identify it. Anyway, how can I be sure about the authenticity?

I took some pictures at the retailer:

Thank you.

Greetings
Your pictures don't display. You need to upload them to Flickr and paste the links in your post.