Illustrated historical reference · Insert

1951–1958 · Regular · Niagara Falls — Insert reference (1951–1958)

1951–58 · Canada insert: Moonlight Canadian insert period reference. Insert construction can overlap and inserts can be replaced, so use this as supporting evidence alongside the case bottom stamp. Glen distinguishes an early insert with a rounded 9 and comma after Canada from a later form with a squarer 9 and full stop; the exact overlap remains a collector-research topic.

Known period: 1951–1958
Plant: Niagara Falls / Canada
Case type: regular
Dating evidence: Supporting comparison — A useful illustrated or photographed comparison. The feature alone does not establish a unique production date.
Reference verification: Historical illustration or documented comparison; not an independently authenticated specimen photograph.

Reference illustrationCanada insert

Reference images

1951–1958 · Regular · Niagara Falls — 1951–58 · Canada insert · primary view — **1951–58 · Canada insert · primary view**Historical reference illustration · Source: Moonlight Zippo

1951–1958 · Regular · Niagara Falls — 1951–54 · early Patented 1950 insert variant · Glen reference — **1951–54 · early Patented 1950 insert variant · Glen reference**Historical reference illustration · Source: Glen's Zippo Page

1951–1958 · Regular · Niagara Falls — 1951–59 · later Patented 1950 insert variant · Glen reference — **1951–59 · later Patented 1950 insert variant · Glen reference**Historical reference illustration · Source: Glen's Zippo Page

Dating evidence and reference verification

Sources: Moonlight Zippo — Historical bottom-stamp variants, Slim dating chronology, and Canadian bottom/insert period references; Glen's Zippo Page — Historical bottom-stamp, case/insert construction details, Canadian dating chronology, and transition research

Supporting comparison: A useful illustrated or photographed comparison. The feature alone does not establish a unique production date.

Reference verification: Historical illustration or documented comparison; not an independently authenticated specimen photograph.

Dating caution. This is a documented period reference, not proof of a precise manufacturing year. Case and insert can have different manufacture dates; inserts may have been replaced. A single feature does not establish authenticity.

Year lookup

Open the interactive Date Your Zippo tool