. >> reporter: mike gibbons said the room known as the vault is where some of the more precious items stay. >> things that are not on display. things in our collection or on permanent loan here that help us interpret storey when is we put them on display. >> reporter: before you can lay a hand on any of the artifacts in the museum you must put on the white gloves. >> feel like mickey mouse. >> reporter: to avoid the natural oils and dust from human skin that can damage the items. >> this space is kept in the dark at a constant temperature at all times. >> reporter: walking through he said the artifacts range from things like the 1947 baltimore colts mascot saddle blanket. the mascot was a real horse and you may think the team's color was always blue and white. >> they were green and silver. 24 proves it. >> reporter: they have a ball cap . >> 1953 the browns, st. louis browns stopped existing. they transferred to become the orioles. >> reporter: and a number of trophy footballs. it's enough to make any fan spin but before we left he had to show off two of the crown jewels. >> late 18t