I think that the labels for these derailleurs might be, clockwise from top left are:

• Simplex Prestige Criterium
• Simplex Prestige
• Simplex Prestige Criterium
• Simplex Prestige

• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: Simplex
• Derailleurs: Simplex Prestige Criterium, Simplex Prestige Criterium, Simplex Prestige, Simplex Prestige