I think I've heard that. How big a magnet does it take? I'd think that if you stuck a large magnet on it,every bit of steel crud would stick to the anvil,which could be inconvenient if you want to keep the top clean.
That anvil looks like a Chinese cast iron one is why I asked what it's made of. They make them with the rear top tapered like that. Can you easily file it on the top or the horn? A good anvil will not file much AT ALL. I can see there is no steel laminated onto the top,but they can be all steel like mine.
Below there are pictures of 2 18th. C. anvils that I made the patterns for for the Anderson Blacksmith's Shop in Williamsburg. The one shown on the stump is the first type. I made that pattern in the 70's and they have several in their shop. The one on the floor is an 5 legged earlier type with a curiously small horn. It hasn't yet had the top ground. They got the hardie hole too large,too. These anvils were cast from 4140 steel. Thay are both 300# anvils. They would have been forged from wrought iron in the 18th. C.,with steel tops welded on. These days,there are no anvil makers with facilities to do that. It takes enormous heat,cranes,and a waterfall to quench them.
Also,there its a beak,or bic iron I made from solid 01 steel. There is a picture of my own anvil with the top polished. We use it mostly for silver work as my wife has a jewelry business I help her with. My polished beak iron is in the hardie hole. This anvil is a rare type with the hardie hole at the front end. It is called a "Soho engine forger's anvil". I have no idea why they wanted the hardie hole at the front end. The yellow can is my last can of Kasenit. For deeper hardening,though,we used aquarium charcoal(which is full of holes),and an enclosed iron container. Aquarium charcoal used to be made of monkey bones from laboratory monkeys,though they don't want that to be much known!! I'm not sure if that's still the case or not.
You can make out 2 small little hammers in the leather strip that I made too. They have a polished fire blue finish. I didn't make the little ball pein between them. The 1/2 round log showing black is African blackwood,which is actually a type of rosewood just as black as ebony when oiled. In the 18th. And 19th.C's,it was preferred over ebony for decorative turning as it isn't abrasive like ebony.