I have found several psycho razors over the last year or so on eBay. They were either mislabeled or labeled so poorly that I got them each for a good prices. I have posted photos of the different ones. Three of them are the Gillette Psycho Tech razors all from different countries and the last one is a Grafco razor. The three Gillette razors from right to left first one is marked 'Y 4', 'MARCA REGIST' and 'IND BRASILEIRA' made in Brazill. The middle one is marked underside of the head 'C 4' and under the cap 'Made in England'. The last one is marked 'Made in USA' and 'X 3'. The Grafco Razor is made in Germany.
How do I determine the dates of the Gillette razors since the Psycho razors had such a long production period. I have Gillette the following date codes: England X 1, C 4, Brazill Y 4 and USA X 3.
Does anyone know the age of the Grafco Razor?