http://proofhouse.com/win/index.html
you need to add a serial number to the question before it can be answered.
According to this website, it was made in 1901 - http://marauder.homestead.com/Model97sn.html
The 67/67A was not serialized. 383,000 were manufactured between 1934 and 1963.
400 dollars is very good condition in the most popular calibers. Double that for .284's