Hello, Mari! As to your question of provenances of the items illustrated in the volume, "The Faberge Case.....", I do not know if provenances are given, as I do not have a copy of this book (By the way, the bidding is closed on EBay on this book and it sold for US$40., with only one bidder). In the exhibition catalogue, "Faberge in America," (mentioned in my reply #2 above of June 9, 2008), provenances ARE given, some more fully than others. As to the ending date, I am certain that you are aware that the Faberge firm was for all practical purposes terminated after the Revolution of 1917. As A. Kenneth Snowman relates in his volume, "The Art of Carl Faberge" ( p. 119), "Immediately after the Revolution, Faberge's premises were taken over by an organization known as the Leningradskoe Yuvelirnoe Tovarishchestvo (Leningrad Jewellry Brotherhood). This Brotherhood , or Trade Union, inherited a number of completed and unfinished Faberge objects and these, together with pieces by other contemporary goldsmiths and silversmiths, they stamped with their own mark L.U.T. " (I am obviously using English letters here.) Regards, AP.