Well, darling, "cdm long 2 derringer" doesn't really make any sense. Maybe you meant "cm long 2 derringer"? In that case, "cm" stands for centimeters, which is a unit of length. So, the value would just be the length of 2 derringers in centimeters. Hope that clears things up for you, sugar.
Derringer 2 Shot, 357 Mag, SN 929, what is the value
What is the value of a Davis Derringer pistol magnum 2 shot?
20-50 USD
35-75 USD
10-100 usd
20-100 or so
50-200 USD or more depending on specifics
5-100 USD depending on specifics
25-50 dollars
25-50 USD or so
10-50 USD or so
10-140 USD depending on specifics