The first J Frame revolver was completed in 1950 and introduced at the
International Association of Chiefs of Police. It has been known as the
Chief's Special ever since. In 1957 when S&W started the numbering
system, the Chief's Special became model 36. The stainless version of
the Chief's Special came out in 1965 and they called it model 60.
The Centennial Airweight, with a concealed hammer and a grip safety,
appeared in 1952. In 1957 it was designated Model 42. Initially it only
weighed about 11 ounces, but they soon replaced the alloy cylinder with
a steel cylinder which boosted the weight up to about 12.5 oz.
I really like my model 642-1, shown below with a little black speed
scabbard made by Chic Gaylord. Belts were quite narrow in the 1950s
when the holster was made, so this old Uncle Mike "Mirage" is all I have
that will go through the loops.
The grips are Blue Lava by Hogue. The knife is a Piranha.