No, assuming you mean C is circumference, l is length, and w is width.
A circle is round and the components are named differently.
The diameter of a circle could be considered (improperly) the width
and the circumference could be considered (improperly) the length
No it is not Clw.
Their both the same Clw is the proper mathematical way of showing Cl x W.
To find the circumference of a circle, multiply the diameter by Pi. Pi is written as 3.14 or just use the Pi button on a calculator. You could also write something to the effect of 3pi.
Claw
As of July 2014, the market cap for Clearwater Paper Corporation (CLW) is $1,377,205,997.76.
I have a clw 03xxxx made in 1971, so that is likely the year that yours was made as well.
Series 70 Lightweight Commander - "CLW" prefix, .30 Luger (7.65mm), .38 Super, 9mm, .45 ACP, 1970-1983 Nearly all of the info you find on the CLW will say they began production in 1970, however, I checked with Colt directly on my CLW with a very low serial # and they stated that it was produced in late 1969. Just my 2 cents.
about 1977
Commander Light Weight
made about 1977Series 70 Lightweight Commander - "CLW" prefix, .30 Luger (7.65mm), .38 Super, 9mm, .45 ACP, 1970-1983
I am guessing about 1980
It was produced in 1970.