Dan, Your son's gun is from 1927. The FW refers to Featherweight frame. Condition is everything as to selling. The 26th Edition (2005) of the "Blue Book of Gun Values" at 60% condition would be $600.00, 80% would be $750.00 add 400% for .410 or $3,000.00 for 80% condition. All depends on how bad someone wants it. Good luck with it.