2023 · 1935 Replica · Bradford
Case / bottom stamp · 2023
Historical year lookup
Zippo 2023
Historical Zippo references associated with 2023: 12 consolidated case/bottom stamp entries, 0 consolidated insert entries, and 29 individual photographic source records. Date codes, materials and insert construction should be assessed together, especially for transitional years.
Bottom stamps and cases
2023 · 1941 Replica · Bradford
Case / bottom stamp · 2023
2023 · Armor · Bradford
Case / bottom stamp · 2023
2023 · Armor · Bradford · 2023 Collectible of the Year
Case / bottom stamp · 2023
2023 · Armor · Bradford · Solid Copper
Case / bottom stamp · 2023
2023 · Armor · Bradford · Sterling Silver
Case / bottom stamp · 2023
2023 · Regular · Bradford
Case / bottom stamp · 2023
2023 · Regular · Bradford · Bimetal · Copper Base / Sterling Lid
Case / bottom stamp · 2023
2023 · Regular · Bradford · Bimetal · Sterling Base / Copper Lid
Case / bottom stamp · 2023
2023 · Regular · Bradford · Sterling Silver
Case / bottom stamp · 2023
2023 · Vintage (1937 Style) · Bradford
Case / bottom stamp · 2023
2023 · Armor · Bradford · Script Logo Collectible · Rose Gold
Case / bottom stamp · 2023
Construction features documented for 2023
Typical US regular-production chronology from independent collector research by Hardi Döhler. The ranges overlap, and Canada, Slim, Replica, Sterling, Japan-market and special editions may differ. These are supporting observations, not a definitive date determination.
Case shapes
- Postwar recessed-bottom profile 1947–2026 · broad · Source: Hardi Döhler
The familiar recessed-bottom case profile develops in the postwar years; this alone cannot distinguish later decades.
Present-day cases, replicas and special lines can depart from the usual form.
Case metals and finishes
- Brass as common regular-case substrate 1954–2026 · broad · Source: Hardi Döhler
Chrome-plated brass becomes typical again in the mid-1950s; special materials and later editions are exceptions.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Hinge development
- Later narrower five-barrel hinge 2005–2026 · transitional · Source: Hardi Döhler
A narrower overall hinge dimension appears in later regular production; use measurements only as supporting evidence.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Insert materials
- Chrome-plated sheet-steel insert 1953–2026 · broad · Source: Hardi Döhler
Chrome-plated steel construction with a seam is typical of later regular inserts, but special and premium variants differ.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Insert lettering
- Both insert faces carry text 1976–2026 · broad · Source: Hardi Döhler
Two-sided marking layouts appear through later insert generations, alongside evolving date-code placements.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Chimney construction
- Open-sided 16-hole chimney 1947–2026 · broad · Source: Hardi Döhler
Sixteen holes and an open wheel-side chimney wall become typical from the late 1940s onward.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Cam springs
- Wide cam spring with tapered wheel-side end 1988–2026 · broad · Source: Hardi Döhler
Later springs show wheel-side shaping/tapering; date the insert using inscriptions and other details as well.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Flint-wheel cuts
- Cross-cut flint-wheel teeth 1946–2026 · broad · Source: Hardi Döhler
Cross-cut flint-wheel pattern becomes typical after the war, with possible overlap and replacements.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Flint-wheel rivets
- Solid flint-wheel rivet 1964–2026 · broad · Source: Hardi Döhler
Solid rivets become typical from the mid-1960s onward.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Felt pads
- Red LIFT TO FILL print with spare-flint hole 2012–2026 · broad · Source: Hardi Döhler
Red LIFT TO FILL lettering appears on many newer pads; it is not a standalone year indicator.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Wicks and packing
- Copper-wire-interwoven wick 1980–2026 · transitional · Source: Hardi Döhler
Copper-wire reinforcement becomes common around 1980; wicks are consumables and cannot reliably date a case.
Typical Bradford-made regular lighter; exceptions and overlapping production runs exist.
Insert construction evidence
- 16-hole chimney — Introduced during 1946; not useful as a precise clue on later inserts. Known period: 1946–9999. Dating evidence: Secondary dating clue (Construction or material information that may narrow a period. Repairs, replacement parts and production overlaps can change the interpretation.). Sources: Glen's Zippo Page.
16-hole chimney · Historical reference illustration · Source: Glen's Zippo Page - Tapered cam-spring end — Minor cam-spring alteration reported around 1988/89. Known period: 1988–9999. Dating evidence: Supporting comparison (A useful illustrated or photographed comparison. The feature alone does not establish a unique production date.). Sources: Glen's Zippo Page.
Tapered cam-spring end · Historical reference illustration · Source: Glen's Zippo Page - Solid flint-wheel rivet — Introduced around 1961; overlaps hollow rivets for several years. Known period: 1961–9999. Dating evidence: Supporting comparison (A useful illustrated or photographed comparison. The feature alone does not establish a unique production date.). Sources: Glen's Zippo Page.
Solid flint-wheel rivet · Historical reference illustration · Source: Glen's Zippo Page - Additional reverse-side text — Additional reverse text appears around 1975/76. Known period: 1975–9999. Dating evidence: Secondary dating clue (Construction or material information that may narrow a period. Repairs, replacement parts and production overlaps can change the interpretation.). Sources: Glen's Zippo Page.
- Copper-wire wick — Wick design changed around 1980 to include intertwined copper wire. Known period: 1980–9999. Dating evidence: Secondary dating clue (Construction or material information that may narrow a period. Repairs, replacement parts and production overlaps can change the interpretation.). Sources: Glen's Zippo Page.
- Regular insert date code use — Date codes are reported as fully in use by 1984. Known period: 1984–9999. Dating evidence: Primary dating clue (An established factory date code or a directly relevant stamp system. Check the complete marking and model type; it is not a certificate of authenticity.). Sources: Glen's Zippo Page.
- Horizontal insert rib — Introduced from March 2001. Known period: 2001–9999. Dating evidence: Secondary dating clue (Construction or material information that may narrow a period. Repairs, replacement parts and production overlaps can change the interpretation.). Sources: Glen's Zippo Page.
- Felt hole reappears — Small hole reappears toward the end of 2001. Known period: 2001–9999. Dating evidence: Supporting comparison (A useful illustrated or photographed comparison. The feature alone does not establish a unique production date.). Sources: Glen's Zippo Page.
Felt hole reappears · Historical reference illustration · Source: Glen's Zippo Page - Cam indentation — Reported from August 2003 on both sides of the cam. Known period: 2003–9999. Dating evidence: Secondary dating clue (Construction or material information that may narrow a period. Repairs, replacement parts and production overlaps can change the interpretation.). Sources: Glen's Zippo Page.
Counterfeit comparison · claimed 2023 codes
These photographs are classified as counterfeits by their source, J. Kim. A stamped year is NOT proof of when the imitation was manufactured. Counterfeit evidence is excluded from the genuine dating reference collection.
Similar years
Interpretation: References may cover multiple years. A documented insert date is not proof of its case production date, and special Replica stamps require separate interpretation.