The only thing, so far I can add; city mark a Stork in a crowned shield (2), the silver guild city mark of The Hague. G.T in oval cartouche the maker’s mark for: Gregorius van der Toorn II (2nd), registered in The Hague 1738-1768. The lion rampant in a crowned shield (3), the province of Holland silver standard mark; 1st standard or silver fineness minimum 934/1000. And The Hague date letter T crowned for the year 1765 (1)
For more information see:viewtopic.php?f=5&t=32028https://www.rijksmuseum.nl/nl/zoeken?v= ... +der+Toorn
It looks like a Gregorius van den Toorn II has been registered in Delft from 1793-1811http://www.wikidelft.nl/index.php?title ... et+deksels
Although I believe this to be a mistake because our Gregorius van der Toorn died June 10th 1771, needs further investigation.