| Gillette England — the serial-number prefixes of the Leicester plant (E / F / G / H) | «Gillette's earliest British factory was in Leicester, England, and began its operations early in 1909. As best as we can currently tell it seems that it probably ceased its operations sometime between 1914 and 1915, and Gillette had apparently vacated the facility by 1916.» | 6 | THE MEANING OF THE PREFIX IS NOT ESTABLISHED — the source prints three hypotheses and picks none of them. The decoder must answer “a British razor wit |
| Gillette England — the type of patent stamp (a boundary, NOT a year) | the source sets the correspondence “Patent Stamp Type 1 = Brit.Pat.No.28763 of 02” | 2 | These are PATENT DATES, not a year of manufacture. BR.PAT.No.28763.02 — a British patent of 1902; PAT.NOV.15.04(.N) — a US patent of 15 November 1904. |