To my eye that looks like a Hay Budden anvil manufactured in Brooklyn, NY until 1925. A five digit serial number in that range IIRC would place it roughly in the early 1890's if it is a Hay Budden. However I do have one problem with that. Your serial number is on the left foot. To the best of my knowledge Hay buddens were marked on the right foot. This anvil is either a Hay budden, a Trenton or an Arm & Hammer. Those three brands used serial numbers. Because the serial number is on the left foot I'm leaning toward Trenton or Arm & Hammer (all very high quality anvils BTW). Lift the anvil up by the horn so it is leaning back on the heel so you can see the bottom. Hay Budden anvils have an hourglass depression in the base. Trenton anvils have an oval depression. Arm & Hammer anvils may or may not have a depression, if so it is oval but their main distinguishing characteristic is a roughly finished underside of the heel.
The definitive authority on anvil identification is Richard Postman. Positive answers can be found in his excellent book 'Anvils In America'.
http://www.amazon.com/Anvils-America.../dp/0966325605
---------- Post added at 05:10 PM ---------- Previous post was at 05:03 PM ----------
Tip the anvil on its side with the horn pointing to your right. Pour some flour on the side of the anvil and gently brush it way so flour is left in all the little scratches & depressions. You might be surprised to see some markings emerge, a logo or letters and numbers.
The definitive authority on anvil identification is Richard Postman. Positive answers can be found in his excellent book 'Anvils In America'.
http://www.amazon.com/Anvils-America.../dp/0966325605
---------- Post added at 05:10 PM ---------- Previous post was at 05:03 PM ----------
Tip the anvil on its side with the horn pointing to your right. Pour some flour on the side of the anvil and gently brush it way so flour is left in all the little scratches & depressions. You might be surprised to see some markings emerge, a logo or letters and numbers.
![Anvil Anvil](http://images.yuku.com/image/jpg/d0436be16046ae048a6efdfeb268c0b0d696ef7a_r.jpg)
![Trenton Trenton](https://www.iforgeiron.com/uploads/monthly_2018_08/W_member_75243.png)
May 14, 2014 - This anvil is either a Hay budden, a Trenton or an Arm & Hammer. Those three brands used serial numbers. Because the serial number is on.