Although I am certainly not an expert, I believe your piece may be Dutch. I have a Dutch tea strainer listed under the Dutch listings (Help with identifing Dutch Markings #2) and it has a similar lion passat mark as yours. I was told by Oel, Co-administrator for Silver Forum, that "We see the Dutch standard mark a Lion Passant above 2 for silver 833/1000 or 83.3% pure silver, mark used 1814-1953."
Perhaps you will want to move your listing to the Dutch category for someone to give you a more definitive appraisal of the other marks.
Good luck in finding out more about your piece. This is a GREAT site!
Thanks Tom you are right. We see two responsibility marks or maker’s marks; H 2 in a rectangle with cut corners for Constantijn Huijgens, registered in the Dutch cities of Leeuwarden, Schoonhoven, Utrecht and Arnhem during the years 1900 / 1911 and R under a ‘hammer’ in a square for; Gebr.(brothers)S. & H. Reltsma or S.Reltsma, registered in the city of Sneek during 1892 / 1948.
Constantijn Huijgens most probably sold this to the brothers as a pre fabricated product or vice versa or perhaps sold by Huijgens to the brothers before he closed shop. Please show us a clear image of the other marks visible which most probably are the date letter and assay office mark.