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Identify the model family before attempting a date.
A color pattern may have been reused for decades and across different bodies.
Build a range from construction evidence.
Material, hardware, lip style, stamps, eyes, and packaging can narrow the possible production period.
Use catalogs and recognized reference works.
Search for the first and last documented appearance of the exact model and then compare variations within that range.
State a date range and confidence level.
“Consistent with mid-century production” is more honest than an exact year unsupported by records.
See what collectors are listing now
Inventory changes constantly. Open a focused eBay search and compare markings, condition, boxes, and seller photographs before buying.
Search eBay listings