This Gillette Tech razor was made for about 30 years in various countries using various materials, as far as we can tell there are no set rules on how, who, and where, what materials were used, and with what models, so I'll simply judge by weight and visual observation and give as accurate a description as I can.
This Tech is USA made (no date code) and has a light gold plating over nickel that has mostly come off, the cap seems to be copper, the base plate pressed steel and the handle brass.
The razors weighs 60 grams and stand 82 mm high.