Photographed collector reference · Case & bottom stamp
1971 · Regular · Bradford — Case & bottom stamp reference (1971)
Zippo · 1971: Original photograph supplied by Terry Lyons of a 1971 Bradford-made regular-size Zippo bottom stamp. The documented code pattern is 2 left / 1 right vertical bars. Reflections, wear and shallow impressions can hide the marks; compare the whole stamp. Photographs establish a documented collector example, not a factory certificate.
- Known period
- 1971
- Plant
- Bradford / United States
- 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
- Photographed specimen; visual features documented, precise production date and authenticity not automatically verified.
Reference images · real photographed examples
Historical variants and original source records
Independent sources and distinct stamp layouts are preserved as individual photographs, not additional main cards. A pictured example alone cannot establish that every lighter from the year used the same construction.
- 1971 · Regular · Bradford — Zippo · 1971
- 1971 · Regular · Bradford — 1971 · Regular · Bradford
- 1971 · Regular · Bradford — 1971 · Regular · Bradford
Dating evidence and reference verification
Sources: In Quiet Detail — Primary photographic and collector reference archive; Glen's Zippo Page — Historical bottom-stamp, case/insert construction details, Canadian dating chronology, and transition research; Moonlight Zippo — Historical bottom-stamp variants, Slim dating chronology, and Canadian bottom/insert period references; Terry Lyons; J. Kim
Supporting comparison: A useful illustrated or photographed comparison. The feature alone does not establish a unique production date.
Reference verification: Photographed specimen; visual features documented, precise production date and authenticity not automatically verified.
Photographic copyright: Credited individually below each photograph
Dating caution. Case and insert can have different manufacture dates; inserts may have been replaced. A single feature does not establish authenticity.