Hi,
Amsterdam guild city mark together with the lion rampant in a crowned shield; 1st standard silver 934/1000 fineness and date letter P.
Your image is not clear but the first mark, although deformed could be; ID above a key under a S for; Johan Diederik Sluyter, registered in Amsterdam, 1720-1761 (the year he died).Known flatware maker.
Looking at the shape of the crown of the city mark of Amsterdam and in combination with the year letter P, I believe it to be for the year 1725.
The maker’s mark of Johan Diederik Sluyter 1720-1761
Oel.