How to Identify Your Vintage Trailer

Owning a vintage trailer is like holding a piece of history, but identifying its make, model, or year can be a challenge. If you’re struggling to determine the identity of your trailer, here are some tips to help you along the way.

Start With the Serial Number

Vintage trailers were issued serial numbers (not VINs like modern vehicles), and these can often provide clues about their origins. Look for the serial number in these common locations:

  • Tongue Rail: Most often found on the passenger side, on top of the rail. Sometimes, it might be on the driver’s side or along the side of the rail.
  • Hidden Under Paint: If it’s not immediately visible, use a paint remover or sand lightly to uncover it.
  • Inside of the Door Jam: Spartan trailers have a distinct plate riveted inside of the jam. I have seen other trailers with them in the jam or even on the door (on top).
  • A plate riveted onto the trailer. Numbers are stamped into the plate.
A plate riveted onto the trailer.
A 1955 Spartan Manor

Decoding the Serial Number

Vehicle Identification Number (VIN) formats weren’t standardized back in the 1950s and ’60s’; some serial numbers may tell you the make, year, and even production sequence of your trailer.

For example, I had a trailer with the VIN: MR 57 25 123

  • MR = Monterey (the manufacturer)
  • 57 = Year (1957)
  • 25 = Length (25 feet)
  • 123 = Production number

Keep in mind that not all serial numbers will follow this structure, and some might not reveal much beyond a production sequence. Vintage trailers can be as short as four numbers and will not contain details like original paint colors etc.

Post a Picture Online

Still stumped? Sharing a photo of your trailer with the vintage trailer community can be incredibly helpful. Post a clear picture of your trailer on the Vintage Camper Trailers Facebook page, where thousands of enthusiasts can lend their expertise.

Additional Resources

For more information, check out these helpful resources:

Online Research Tips

While serial numbers provide a solid starting point, exploring online forums, manufacturer archives, and vintage trailer groups can help fill in the gaps. Search for trailer brands that match your serial number prefix or unique design features.

Identifying your vintage trailer might take some detective work, but the process is a rewarding journey through history. Share your findings, connect with other enthusiasts, and enjoy the adventure of restoring and celebrating your piece of Americana!

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