I found a reference (via Wikipedia) to 67 Olympus 593 built in total.
The Rolls-Royce SNECMA Olympus 593 Concorde Engine - the fascinating full story of the Olympus 593 Mk610 from concept to service
I remember seeing a picture a few years ago of a Vulcan doing a touch-and-go at an airshow and rearranging the tarmac with the. With the mentions that have been made of the little clearance between the nozzles and the ground in landing config, did Concorde ever come close to doing something similar? Was careful consideration taken of the runway surface before doing a touch-and-go at a display?