In 2001, to celebrate the 150th anniversary of the partnership with Tiffany & Co., the T150 Ref. 5150 was released in a hunter case with an annual calendar, limited to 450 pieces in 18KYG, 18KRG, and 18KWG, with 150 pieces of each.
Due to the engraving, there are some scratches and small marks on the back cover, but the case and buckle are in good condition with no noticeable scratches.
It has been hard to find on the market lately, so I would especially recommend it to anyone looking for one.
*Normally it comes with a buckle, but currently it comes with a genuine folding buckle, making it a great value option.