Photographed collector reference · Case & bottom stamp
1971 · Regular · Bradford — Case & bottom stamp reference (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; date or classification attributed to the source, not factory-certified.
- Source attribution note
- Photographed collector specimen attributed to this production year; inspect the complete code, not an isolated mark
- Year attribution
- date-code-supported collector attribution
Reference images · real photographed examples
Consolidated reference
This archival entry remains available under its original URL. The consolidated display groups examples of the same dated model type and production plant without removing this source record.
View the unified 1971 · Regular · Bradford reference and photo gallery
Dating evidence and reference verification
Sources: Terry Lyons
Supporting comparison: A useful illustrated or photographed comparison. The feature alone does not establish a unique production date.
Reference verification: Photographed specimen; date or classification attributed to the source, not factory-certified.
Source attribution: Photographed collector specimen attributed to this production year; inspect the complete code, not an isolated mark
Photographic copyright: Terry Lyons
Dating caution. Case and insert can have different manufacture dates; inserts may have been replaced. A single feature does not establish authenticity.