First Inaugural metrocard set was issued to the public in 1994. Some cards were distributed separately via vendors and the whole set of 4 different cards was available for purchase through MTA in special envelope (Seal is on the back of the envelope, I just move it in front since envelope is simply white color on the back) and plastic folder front and back.

In all 4000 sets were issued.

Here are images:

Grand Central Terminal

New York City Skyline

World Financial Center

Times Square