I have a New Old Stock package Schick Adjustable dial razor. I have not opened it but I have included some photos. I have tried to find date code information before with no luck. I noticed that on the back of the package it has a copy right of 1972 and also in the corner of the package it has M-72-153. Does this mean that Schick razors with M-72 under them are made in 1972?