Top left of the rat's tail Dutch hatchet the 1853 duty mark for old silver objects of national origin returned to the trade.
To the right of the rat's tail perhaps remnant town mark of Leiden, 2 (crowned) crossed keys in a cartouche with next to it the remnant province of Holland mark; the lion rampant to indicate 1st standard silver 934/000 fineness.
Left below the duty mark, a year letter V(?) for 1706. Maker's perhaps a bell for Leiden ..... unidentified (Karel A. Citroen, Dutch Goldsmiths' and Silversmiths' Marks and Names prior to 1812). The existing literature about Leiden town silver is a small Museum booklet showing only a few year letters.
Leiden 17th century wedding spoon:
https://www.lakenhal.nl/nl/collectie/5777
Yes I could be totally wrong. The marks are a pain in the.....or eye.
Peter.