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Gillette is one manufacturer for whom we have information on serial numbers and later date of manufacture codes that we can link to time.Razor Serial Numbers were impressed on all Gillette razors from 1904 until 1921, and on deluxe models from 1921 until 1931 (except for a period in 1927-28).Also included in the parcels are a deck of cards, a book of crossword puzzles, snacks, games, suntan lotion, tissues, a hacky sack ball, moist towelettes, a hand-held fan and a multipurpose tool packaged in a lightweight, durable, reusable travel bag.
Razor Date Codes began in 1950 and used the same system blades had used since 1930, a code that identified the year and calendar quarter of manufacture.
This corresponds to the time King Gillette was directly associated with the business, and may have been at his insistence.
These serial numbers were on the top of the guard, or sometimes the inner barrel.
In recent years batteries have changed out of all recognition. Today the cells are components in battery systems, incorporating electronics and software, power management and control systems, monitoring and protection circuits, communications interfaces and thermal management. Mesopotamia, incorporating Sumer, Babylonia and Assyria, known in the West as the Cradle of Civilisation was located between the Tigris and Euphrates rivers (The name means "land between the rivers") in the so called Fertile Crescent stretching from the current Gulf of Iran up to modern day Turkey. the Sumerians of ancient Mesopotamia developed the World's first written language.
(See Map of Mesopotamia) Unfortunately this accolade ignores the contributions of the Chinese people and the Harappans of the Indus Valley, (Modern day Pakistan) who were equally "civilised" during this period practicing metallurgy (copper, bronze, lead, and tin) and urban planning, with civic buildings, baked brick houses, and water supply and drainage systems. Called Cuneiform Writing from the Latin "cuneus", meaning "wedge", it was developed as a vehicle for commercial accounting transactions and record keeping.