I feel certain this question has been answered here, but I have not been able to find any reference. When did the Gillette old type change from the thin cap to the thick cap style? TIA for responses!
or is "1920s" as good as it gets?
1921, when they introduced their new model, the New Improved. All Old Types made after that have thick caps.
Here's a great picture showing the different versions (thank you Achim)
Hi,
My Grandfather's OT is a 1921 Thin Cap, and it has a serial number on the baseplate to date it. N641273. According to the chart, 1921 wasN459887‑N999999. And, I am unsure about the All Nines there. I suspect we do not know the actual last number used. But, they didn't go beyond that, for sure.
I also had a later Thick Cap OT, and it had no serial number. All it had was a 1921 patent date on the handle (vs the 1904 patent date on the Thin Cap handle).
Stan
@KQY61
AFAIK there's no 1921 patent. The OT patent dates from 1904 in the US and 1905 in Canada. The New Improved patent is JAN 13 1920, and that patent was never used on OT handles.
NEW handles OTOH do have the 1920 patent as it refers to the channels behind the combs which is a feature shared by New Improved and NEW razors.