McGarr and the Sienese Conspiracy (1977)

Bartholomew Gill's Peter McGarr mystery was published by Scribner in 1977; the copyright is in the name of Mark McGarrity, the author's own name. McGarr, Chief Inspector of Detectives of the Irish police, investigates the murders of three high-ranking members of the British Secret Service, two on Ireland's westernmost peninsula and the third at the Palio in Siena, and finds that each had once held a post in competing offshore drilling operations. (Open Library)

Watches

Rolex watch: McGarr empties the pockets of a man found shot in an outbuilding at a house near Dingle: Edward Llewelyn John Hitchcock, of St. John's Wood. On the back of his Rolex, whose dial can show the time elsewhere in the world, the inscription reads "To C. from your Sis-ter". McKeon finds it strange, Greaves has never known an inscription to stammer, and Scanlon explains that C. is what the chief of SIS is called. McGarr later holds the inscription back when he tells a British contact every other detail of the case (p. 21). The world-time dial is described, not named. The maker is named; the model is not.

Source text: On the back of his Rolex wristwatch, the dial of which was equipped with a device to determine times in other parts of the world, was the inscription “To C. from your Sis-ter,” and under that, “Peace through Truth, London, 1973.” (Bartholomew Gill, McGarr and the Sienese Conspiracy, scan cataloged as Scribner, 1977, p. 8; Internet Archive scan OCR)