Under the hood: Many classic cars have the VIN stamped on a metal plate under the hood, typically on the firewall or near the engine.
On the frame: Some classic cars have the VIN stamped on the frame of the vehicle, often visible near the steering column or below the driver's or passenger's seat.
On the dashboard: Occasionally, the VIN may be etched onto a metal tag and attached to the dashboard, visible through the windshield.
Inside the passenger door: Some classic cars have the VIN sticker pasted on the interior door.
Vehicle Title: It might also be listed on the car's insurance or title documents to easily locate.
It's worth noting that VIN locations may differ for older and classic models, so it's a good idea to check the owner's manual or specific resources for your particular vehicle if you're unable to find it in any of the commonly-known locations.