I have not yet located a copy of Canfield's book. In its absence I find myself mumbling, "I should have asked my Dad." He was an Army captain in the Pacific theater.
Since more than a million 97s were made, I suspect its long-term reliability and durability with routine non-combat use and maintenance is not questioned. Had its production cost with selling price remained profitable, it may not have been replaced in military inventory during the Vietnam War, not because it was superior to subsequent designs but because it was in inventory and [up to a point] maintenance is less expensive than replacement.
Unfortunately, people who have first- or second-hand knowledge to my question are nearly gone. I guess the best I should look forward to appears to be reference material — books, manuscripts, and audio recordings.
Since more than a million 97s were made, I suspect its long-term reliability and durability with routine non-combat use and maintenance is not questioned. Had its production cost with selling price remained profitable, it may not have been replaced in military inventory during the Vietnam War, not because it was superior to subsequent designs but because it was in inventory and [up to a point] maintenance is less expensive than replacement.
Unfortunately, people who have first- or second-hand knowledge to my question are nearly gone. I guess the best I should look forward to appears to be reference material — books, manuscripts, and audio recordings.