Mintage: 3,677,175
Metal Composition: 91.67% Copper - 8.33% Nickel
Diameter: 26.5mm
Mass/Weight: 8.1 grams
What This Coin Looks Like (Obverse, Reverse, Mint Mark Location, Special Features, etc.): 
The 1979 Type 1 Filled S Susan B Anthony (SBA) Dollar has a smaller S mint mark which is partially filled in and not as clear and is only found as a proof coin. Depicted below is an example comparison image between the type 1 filled "S" vs type 2 clear "S":
