Patent number dating chart
To determine the date of manufacture and rarity of your Victrola, simply scroll down the list below and click on the model you are interested in, and look-up the serial number on the resulting listing.
Readers are encouraged to review the section Victor Production Identification before reading the dating charts and valuation charts, so that the correct model information is understood.
Unfortunately, many plane types share the same bed markings, so other features are also used in dating.
Some plane parts were frequently replaced by their owners, or are easily separated from the plane, such as irons, cap irons, knobs and totes, and lever caps.
These features are avoided where possible, along with features that appear in only some planes of a given type (i.e. Where possible, the flowchart uses parts that were probably replaced less often, such as frogs, depth adjustment screws and lateral adjustment levers.
If you do not have these details you will need to search the relevant indexes (see British Patent Indexes box on this page). You can order them to be retrieved using your State Library card.If you own a Victor product, and would like to contribute to the master database, please click here to access the questionnaire. These dates (often 1904, 1906 or similar) indicate the date that a particular design was originally patented, not when the machine was produced.No names or addresses are necessary, only information relative to your phonograph's serial number, design features, etc. The License Sticker date will also likely not reflect the accurate production date of your Victor or Victrola machine.If your Zippo lighter needs repair, please visit our repair page for instructions.The United States patent number for each year is the first patent issued that calendar year.