1st letters are the makers initials, which neither rings a bell in me. 2nd is the lion mark for sterling silver 3rd is the city mark which looks like the one for Edinburgh 4th is the year made mark. That's about all I can guess without searching online or finding a book i got somewhere that lists hallmarks. They look rather old in style and those date marks will say for sure how old they are.
Very nice. Both are London hallmarked Sterling silver. What @tamrock perceives as an Edinburgh mark is a crowned leopard's head for London (for both pieces).
The first one has the ‘S’ date letter for 1773 and the ‘T.T’ mark with the slightly raised stop between the letters is for Thomas Tookey. A similar mark was registered by Thomas Taylor I in 1767 but I would be sure it’s Tookey’s mark, which was first registered in October 1773 (the same year as the hallmark).
The second one has the ‘f’ date letter which I believe is for 1781 although it has a minor anomaly in that it looks to be italicised and should not be. That ties in with the maker mark ‘HB’ which is for Hester Bateman. She first registered in 1761 but that style for her mark dates between 1776-1788