From the CoinWeek IQ Encyclopedia:
1 Euro Coin (2002-Present)
The 1 euro coin is a bimetallic coin composed of a copper-nickel center with a nickel-brass outer ring. Along with the 2 euro coin, the 1 euro coin forms the backbone of eurozone coinage. The 1 euro and 2 euro coins are similarly bimetallic, except that the inner and outer core compositions are reversed on the 2 euro coin so as to make the coins easily distinguishable from one another. The 1 euro coin is slightly smaller in size and slightly lighter than the 50 euro cent coin. In relation to the size of U.S. coinage, the 1 euro coin is approximately 10% larger than the U.S. five cent coin.
The 1 euro coin represents the standard unit account of the euro monetary system. It is valued at slightly more than one U.S. dollar.
Composition: bimetallic; copper-nickel center with nickel-brass outer ring | Weight: 7.5 grams | Size: 23.25 mm
National Side (Side Unique to the Issuing Country)
Designer: Josef Kaiser
Copper-nickel center: Bust of Mozart, body facing right, face straight ahead. Mozart’s signature on left shoulder, on coat. Date to Mozart’s left, wrapping around rim. Large number “1” to the right of Mozart’s head, surmounting the word EURO. Austrian flag below.
Nickel-brass outer ring. Inner border. Stars representing each of the original 12 member states of the Eurozone circle the perimeter of the coin and are bordered by a raised outer rim.
Designer: Luc Luycx (View Designer’s Profile)
Type 1: To the right, six horizontal line segments containing stars at each end. Individualized representations of the 12 original Eurozone states, centered and dividing the stripes. Large numeral “1”, centered on the left. To the right: the inscription EURO, all italicized. The designer’s initials “LL” appear below the O on the outer nickel-brass outer ring. Design encircled by a raised rim. Type 2: Same as Type 1, except, instead of the individualized representations of the 12 original Eurozone states, centered and dividing the stripes, a full representation of Western Europe, centered and dividing the stripes.
The Austrian Mint strikes the 1 euro coin in three unique finishes: a business strike intended for general circulation; a satin finish specimen strike produced for collector sets; and proofs, which are sold in annual proof sets.
CoinWeek Austria 1 Euro Coin Business Strike Price Guide
CoinWeek Austria 1 Euro Coin Satin Finish (Mint Set) Price Guide
CoinWeek Austria 1 Euro Coin Proof Price Guide