
The Monitor I incorporated the fuselage, tail assembly and 140 hp Renault 4 Pei engine of the S.V.4C biplane married to a wooden wing.
The Monitor II had a metal wing and a 240 hp Salmson-Argus engine.
The SR.7 Monitor III, also known as the Farman F.521 Monitor III, was built in France by the Societe des Usines Farman with the collaboration of Stampe-Renard.
The Monitor III first flew on 15 June 1954.

Monitor I
Engine: 140 hp Renault 4 Pei
Monitor II
Engine: 240 hp Salmson-Argus
Monitor II
Engine: 170 hp SNECMA-Regnier 4L-22
Wing span: 30 ft 11 in
Length: 22 ft 2.5 in
Height: 7 ft 11 in
Empty weight: 1232 lb
Loaded weight: 2083 lb
Max speed: 143 mph
Cruise: 118 mph
ROC: 787 fpm