Western was a company in the Case family,they made their own knives until sometime in the 1980s,then Camillus made them into the 1990s.I believe the w66 is a model number not the year.I also believe it was a set made in the 1950s or 1960s.Like others have said,if you post it in the Camillus forum or BRLs forum,I'm sure you can get a better history.If your neighbor ever finds out what it's worth in that condition,he'll probably want it back.