CTG stands for Cartridge
The term ".38 Special CTG" is an abbreviated way of saying .38 Special Cartridge. It is the caliber marking for a revolver that fires that cartridge. While it is NOW the most common .38 caliber cartridge, there are more than a dozen DIFFERENT .38 revolver catridges that were made at one time.
Cartridge
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ctg = cartridge
1977.
100-650 USD
1982
Your Colt Trooper .38 special CTG # 68404 was produced around 1968. made 1968. value depends on condition
38 special is a full length 38 cartridge whereas a 38 S&W cartridge is also a 38 caliber but it has a shorter case.
1952
Made in 1979.