This Anaconda Mines copper (?) miniature anvil is an advertising item and dates to the late 1890's. The anvil was made by the (former) KRONHEIM & OLDENBUSCH METAL NOVELTIES COMPANY, Brooklyn, NY.
This anvil reads: Gallows, Frame & Hoist; Anaconda Mine; Butte, Montana.
The anvil measures 3 3/8" long, 1 3/4" at its widest, and is 1 1/4" high. The metal does not hold a magnet.