Since you said "gun" and not "Handgun" I would grab the single shot Iver Johnson my grandfather and great grandfather used to feed the families - it is so worn that they carried a steel ball bearing to roll down the barrel to "eject" the shell. The ball bearing got lost before I got my hands on it. Even in handguns I would go nostalgia and grab the high standard .22 revolver I got from Dad! Would be tough call if I had his old Model 10 in hand.