Hour Game (2004)

David Baldacci's second King and Maxwell novel sends the two former Secret Service agents after a serial killer in Wrightsburg, Virginia, who restages the signatures of famous murderers. One of those signatures is a wristwatch. (Wikipedia)

Watches

Zodiac watch: The killer leaves a Zodiac watch on a victim as a calling card, borrowing the circle-and-crosshairs emblem the Zodiac Killer took from the brand's dial logo; King identifies it and later tells the police to work out where the killer obtained the watch. The watch is a plot object rather than something a character wears, and no model is named.

Source text: "Michelle, it's a Zodiac watch." (David Baldacci, Hour Game, scan cataloged as Warner Vision Books, 2005, pp. 18, 25, 28, 195; Internet Archive scan OCR)