Rare Antique Vintage Slag Glass Akro Agate Base Household Office Fan. Runs well and has good speed, but does have some vibration. Slag glass in very good condition! 5 1/2 glass base diameter. Youtube video of fan running. The item “Rare Antique Vintage Slag Glass Akro Agate Base Household Office Fan WORKS” is in sale since Thursday, January 11, 2018. This item is in the category “Collectibles\Kitchen & Home\Electric Fans”. The seller is “cardude085″ and is located in Greencastle, Indiana. This item can be shipped to United States.