Brass/aluminium, 22mm diameter.  NEW YORK CITY TRANSIT AUTHORITY  around.  R. GOOD FOR ONE FARE around,  SJD above central portion.  Atwood 630 AT  Good VF

This type of token was introduced in 1986 when the cost of a ride rose to 1 dollar. Its bi-metallic nature gave it the nickname "The Bull's Eye".

Ex David Rogers collection.