Also bear in mind that photos of rifle finish and engraving are very difficult to judge conclusively. In hand is always better. Even then may not be conclusive.
Previously I have been in contact with Roger Bleile who is probably the foremost knowledgeable engraver of our time and historian with FEGA (Firearms Engraving Guild of America).
He has studied engraving from Nimschke to present and has commented to me that unless a maker mark is present, it is difficult to tell for certain who a particular engraver was.
Keep an open mind while studying and comparing. Might be surprised where it ends up if/when other info comes available.
