I believe closer examination of the 5th mark will show it to be an uncrowned leopards head of the London Assay Office and not the anchor of Birmingham as all other hallmarks point to this.
T G is the sponsor mark of the London importer, Thomas Glaser. His mark was registered in Jul 1886 at the London Assay Office
Date letter T = 1894
F = "Foreign" mark used by all assay offices 1867-1904
Maker marks appear to be Hanau pseudo marks belonging to B Neresheimer & Son who specialised in producing this style of " reproduction antiques". Please check your second mark against the example labelled S520 on the link below:https://www.925-1000.com/Fgerman_hanau_marks_01.html