2.1 Major Characteristics

2.2 The Coppell Classification

https://1960nma.org/chapter-2/2-3-factory-markings-and-dealer-stamps/

2.4 Liège Proof House Marks

2.5 Milestones and Serial Numbers

2.6 Total Production in Perspective

2.7 The Hanquets

2.8 The Missing Link

2.9 Production of the Centaures

2.10 Not For Collectors Only