How precisely can a Thomas Turner razor be dated?

Only as a window inside roughly 1834 to 1921, unless the country mark ENGLAND narrows it to after March 1891. No source found gives stamp wordings with their own dates.

The maker's archive

Thomas Turner razors.

Thomas Turner of Suffolk Works is the thinnest record among the Sheffield straights in this archive. The only printed point is the firm’s years of operation, and no stamp wording with a date of its own was found, so the dating answer is a window inside that span.

Country: UK
Active since
Coverage: 1760–1950 · 3 code systems
Dating tier: Codes only
In the archive: 0 series · 3 code systems · 1 models
Years documented: 1760–1950

Eras

c. 1834–1921

Suffolk Works

Thomas Turner & Co worked from Suffolk Works in Sheffield, and the firm years of operation are the only printed dating point that was found for it. No stamp wording with a year of its own is recorded, so nothing finer than the firm window is available.

What dates this maker

The firm window, roughly 1834 to 1921 — the only firm date the sources give.
The stamp Thomas Turner or Thomas Turner & Co, with the Suffolk Works address.
The country mark ENGLAND, which separates specimens after 1 March 1891.
The shared grind and scale markers, which narrow the era of the blade itself.

Watch out

There are no stamp wordings with years attached, so no finer answer than the firm window is documented.
A missing country mark does not prove the razor is pre-1891 — the marking requirement applied to exports.

Thomas Turner & Co (Suffolk Works) — the stamp and the erac. 1834 → 1921 · 2 rows · Low confidence

Country mark (lower bound, NOT a year)the requirement applies from 1 March 1891 (Tariff Act of 1890, also known as the McKinley Tariff) · 2 rows · High confidence

Grind, spine, scales, etching — era markers of a straight razor1700s → mid-1900s · 16 rows · Low confidence

1 Thomas Turner models are catalogued with their production years, specs and safety notes.