Whitey this is a link to information on the glove. I noticed the triple crown logo and I remembered the Armour franks promo. But the MM9 was in production long before the promo. I would think the box is a Hot item and would draw lots of competition in any number if auctions. Unless you find a very recent auction sale for that exact box I would be wary of any comps. As it seems to be a box that is on alot of collectors want lists.
https://keymancollectibles.com/glove...riplecrown.htm
Hope this helps
Jonathan
Edit I found a picture of a MM9 box but it is different than yours. Not surprising since it was in production for so long. But yours is a very nice example. The mm9 is on page 6.
http://mickeymantle7.net/mantle-gloves-and-boxes/