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Bottle bases · reference-only clue set
Owens-Illinois diamond–oval–I base mark
Preview
Maker: Owens-Illinois Glass Company
Reference clues for visual comparison — not authentication, exact dating, or valuation.
This preview preserves a possible association with Owens-Illinois Glass Company, but independent evidence or visual-rights review is still incomplete. Use it as a lead, not a confirmed identification.
Mark-specific visual withheld
Use the written features and cited references until an independently reviewed visual is available.
- Region
- United States
- Broad period
- 1929–1966
Observable features
- Diamond enclosing or surrounding an oval and I
Common misreads and confused-with clues
- Illinois Glass diamond-I
- Owens box-O
What the sources support
The cited material supports a bounded maker or mark-family context and the broad period shown here. Exact variants require further review.
- Society for Historical Archaeology · reference · accessed 2026-07-29
- Glass Bottle Marks · specialist reference · accessed 2026-07-29
What this mark cannot settle
- The mark alone cannot establish authenticity.
- The mark alone cannot establish condition or provenance.
- The mark alone cannot establish an exact production date unless a specific variant is independently sourced.
- The mark alone cannot establish value.