I saw this Krag on Gunbroker and generally, I ignore those I see advertised as "Philippine Constabulary" rifles and/or carbines. However, I did see the "block" JFC stamp, which I rarely see on Krags. I believe Brophy did say was seen on some PC carbines or rifles.
Thought I'd throw it out there for your consideration:
http://www.gunbroker.com/item/615736607