How do I find out the weight of a 1985 Komfort Lite 12' trailer?

According to... http://www.nadaguides.com/default.aspx?LI=1-25-38-5694-0-0-0&l=1&w=25&p=38&f=5697&m=0272&y=1985&ml=K&gc=RV>c=TT&d=2300035288

The smallest trailer they made in 1985 was 14'. It weighed 1620 lbs.