The TAG Heuer Monaco (originally Heuer Monaco) is a series of automatic chronograph wristwatch originally introduced by Heuer in 1969 in honour of the Monaco Grand Prix. The Monaco was revolutionary for being the first automatic as well as the first square cased chronograph. The Hollywood film star Steve McQueen used the watch to accessorize his character in the 1971 film Le Mans. In the decades after his death the use of film stills has made the watch synonymous with McQueen. Although it was discontinued in the mid-1970s, the Monaco was reissued with a new design in 1998 and was reintroduced again with an entirely new mechanisms in 2003 in response to McQueen's increasing popularity. The watch typically features a pair of pushbuttons at the 2 and 4 o’clock position. The dials for the minute and hour counters are at 9 and 3 o'clock respectively. There is a hand-applied date window at 6 o’clock. The watch also features chamfered square and oblong hours markers (dials with "waffle" type cross-hatched markers are later reproductions). In the original version, the crown is located at the 9 o'clock position on a square casing. The shape was revolutionary at the time for a chronograph watch. Early versions came with two different colour schemes. The first (represented by the letter B at the end of the reference code) had a metallic blue dial with white registers. The other (represented by the letter G) had a metallic grey dial and registers. The G model is less popular with collectors.