Hi Bruno,
It seem that there have been two Anniversary Edition Mikrons:
A) In Oct 1997 the 6x15 CF in chrome (with black central band)
B) In Sep 1998 the 7x15 CF in black
In 2000 there was also a Milennium Edition 7x15 CF in champagne finish (with black band)
For the details go to Hans Braakhuis’ site:
http://www.hansbraakhuis.nl/Nikon/Nikon.html
Go down the first column to ‘verrekijkers’, then across to:
- ‘Mikron Presentation’ (dated Oct 2011), which includes the attached screen grab
- ‘Mikron verrekijkers’ (dated May 2012), for more detail (in Dutch - you can Google Translate)
The 6x15 Anniversary is clearly multi-coated, see the attached image from catawiki:
https://auction.catawiki.com/kavels/25211755-nippon-kogaku-nikon-6x15-micron#lot
Bear in mind that the current production may very well have improved coatings
John