The most common hypothesis about how the Vivitar serial number system worked involves breaking the serial number down into separate components that represent the manufacturer, year, week, and sequence number.
He is interested in communicating with anyone who worked for Ponder and Best, particularly in a procurement position. Steevithak is actively researching this topic and frequently updates this page. There is general agreement among collectors that sometime after 1990, this system fell into disuse or was completely abandoned. The first lenses that appear to follow this number scheme appear in the late 1960s and by 1970 it appears to be used consistently. The consensus seems to be that most lenses sold in the 1960s did not use this system. "P&B Vivitar" or "Vivitar Professional") and in lenses sold late in the history of Vivitar. There are many documented exceptions to the numbering system presented here, especially in lenses with very early or unusual badging (e.g. The sources used in assembling this list are cited as used but not all should be considered authoritative. Many variants of this list can be found online, sometimes with unsubstantiated claims the list was provided by Vivitar insiders. The information presented here is the result of individual research by lens collectors. Vivitar never published any public documentation of their serial numbering system. It is actively changing in response to ongoing research. This list should not be considered definitive.
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