Police Positive Special vs Army Special - frame size comparison
Colt's Police Positive Special - Shooting Times
Colt's Police Positive Special - Shooting Times
Colt Detective Special - Wikipedia
J, K, L, N, M? E-I-E-I-O… Demystifying All Those S&W Frame Types - American Handgunner
Question on aColt Army Special
Colt vs. Smith & Wesson: Reviving a classic debate among revolvers
Framed: Revolver Sizes & What They Mean
What is the difference between a Colt Army Special and a Colt Detective Special? - Quora
Colt Army Special frame vs Colt Official Police frame.
Colt Frames (reference guide)
GUNS Magazine Colt Official Police And S&W Model 10 - GUNS Magazine
Colt Official Police - Wikipedia