Hello again markbd; you initially asked for help with age of the anvil, I & now Oregon rock crusher have requested additional information.
From the your left thumbnail photo, the anvil, to me is sitting on a hand-hewn timber, no fake 'distressing'. The timber is meant to be spacer to a larger base, as evidenced by the 'hold-down' irons at the base. The horn appears worn smooth at the hilt; leads me in the direction of smith work on iron rims for wagons, diameter range determined by the distance from the top of the horn to the bottom of the base.
Please measure and report that distance; there should also be 'tell-tale' marks on horn side of the base, please have a look, send us a picture of also if warranted - educates us.
As for age of the anvil; if it was used for iron rims, then it was definitely maybe used before Ford's Model T.
The more information you send, the more effective the group can work with you; begin to bracket the age & believe me, this anvil had nothing to do with any steel shortage.