There probably never was a tag on your trailer with that information. It's only been in the past few years that manufacturers have been publishing an "as equipped"
weight for individual trailers... and that is generally based on the average "dry"
weight of the shell and chassis, and then adding the average weights of options like
air conditioning, stove,
fridge, etc. etc. etc.
I'd suggest you find a scale and have it actually weighed.
Roger