There are occasions when blocks of serial numbers have been manufactured out of sequence, sometimes years later.
Also, within a model family the same serial number prefix may be used to produce a variety of different models, all in the same block of serial numbers.
After host Jim Lange introduces "successful photographer" Alcala ("You might find him skydiving or motorcycling!
The manufacturer's code is used to determine the year the car was made, not the serial number.
The specific order of the numbers changed over the years, but the manufacturer's code always has a letter and the last two digits of the year it was made incorporated in the code.
(He remains in prison in California.) While Alcala's body count is unknown, police estimate the now-73-year-old man killed at least dozens of women, with some counts running as high as 130 – and there are still over 100 photographs of unidentified women who may have been his victims.
But in 1978, two years before the murder conviction, there he was: Bachelor Number One.
The serial number is either 6 or 7 digits, but it does not indicate the model year.
Prior to 1976, the serial number plate was under the driver's side seat, just behind the battery closest to the driver, or on the fender skirt.
If your firearm does not appear in the listing, please understand that this is not a comprehensive database.
Information provided here is approximate, if you wish to support your investment with the purchase of a complete history and Letter of Authenticity for your firearm or for more information, please contact Colt's Archive Department.
*For these formats, the letter always represents the month. It represents the first month of production for that year.
Usually, production begins in July or August, but can vary by year.
The Gibson Serial Number Decoder currently supports 6 formats from 4 Factories.