New member here after finding this wonderful site. Very impressed with knowledge being passed here. I recently purchased the following described rifle for $350.00 at a garage sale. Gentleman said it was his dad's (passed away) who brought it back from Korea. Barrel marked "Underwood 6-43 bomb w/flame", Front sight marked "EU" on right side, rear sight "l.R.CO." believe it a type II Korean vintage, OP Slide marked "bomb w/flame" Mag Release "lM", Front band "KI", Receiver marked "Underwood" serial number "179XXXX", Stock right rear "NPM" over"FJA" contained in box, just to right of box cartouch can't read, stock left rear in sling window "TRIMBLE" over "TN", stock left side behind hand grip stamped "U", bottom of hand grip number "46" yellow stamped over letter "M". I also got 2-15rd mags marked "U", 1-30rd mag marked "M2", and 5-15rd mags marked "IS" as the mag sits upright. I am wondering if this is collectable and or needs to be insured? I've attached a few pictures for your review. This is a fun, accurate, and great shooter. Any and all info greatly appreciated.