The following is a graphic from an internal Gillette marketing document in the 1950's showing how the range of settings of the adjustable razor satisfies the shaving desires of 99.7% of all consumers.Also, the average consumer will prefer a setting of "5" and 68% of all consumers will be satisfied with an adjustable between the settings of "4" and "6". So, for example a date code of D-1 is an adjustable razor manufactured in the first quarter of 1958 or first quarter of 1983 depending on the razor model.
These numbers have a "less than" symbol which says yes it is true (as well as I can guess) but maybe not so close or accurate.
The numbers with an asterisk could be off by up to 4 or 5 times.
These serial numbers were on the top of the guard, or sometimes the inner barrel.
There were no razor serial numbers from 1931 until 1950.
The numbers mean the three month quarter of manufacture. The types of information include discussions with other collectors and in a large part the frequency with which each model type comes up for availability on e Bay.
If there are a bunch for sale every day, there must be a lot of them.During certain periods some or all models were unmarked. The Old Type continues as "Brownie" and various other sets, but without serial numbers. In 1930 Gillette stopped using serial numbers on razors.So razors made from 1930-49 can be difficult to date precisely.Following that is a chart explaining the coding system Gillette used from the beginning. Puedes consultar la lista de mujeres disponibles en tu zona para buscar a través de sus imágenes.This is not 100% accurate, since the blades may not be original or may have been made before or after the razor. The single-letter date codes are accompanied by a number, which corresponds to the quarter of the year. Date codes on blades (see above) also continued through this period.