...; from Frenkel, Utrecht, fl. 75, to Maurits Elzas (1868-1937), Arnhem, 1921;{NHA, RBK, INV, inv. 1215, no. 48.} by whom bequeathed with 106 other watches, as part of the 'Maurits Elzas Collection', to the museum, 1937
Bibliography and list of abbreviations for the provenance (pdf)