Pair 1973 is the last Super Boot 40 Belows that Timberland will make. Pair 1973 come with a letter from Timberland congratulating the owner. This letter (in a plastic protective cover) will be included in the box and is signed by Timberland's Director of Classics on official Timberland letterhead. I am the original owner of pair 1973/1973 and won the Rainforest Alliance auction on eBay about a month before the public was able to buy the remaining pairs. To maintain providence and a chain of custody, a print out of my original transaction will be included and this pair will be shipped in the original box as shipped from the Rainforest Alliance.
The 1973 pair are slightly darker than all of the other pair I've seen. I believe this is due to extra protective polish. They look smoother than other browns I've seen also.