Saif, I'm not a Jeffery expert but it looks like the real thing to me. I don't see any difference in the numbers, aren't they both 28598? Military action is no issue as the early Jefferys were built on military actions. If a military action is good enough for Harry Selby's .416 Rigby, it should be good enough for this rifle. All in all it looks to me like a pretty nice classic rifle. I'd suggest a good cleaning and nothing more so long as it shoots reasonably well.