Seeking info on marks on 18th Century(?) cup

[panmich]

My family of Scottish origin emigrated to New Brunswick some time in the 18th or early 19th century. As part of my research trying to pin down a narrower date range, I've been trying to identify the markings on this cup. I'm not sure whether the cup originates in/near Scotland or elsewhere, and the only other clue as to its age is a hammered date and initials on the bottom: HDH 1775 (likely indicating this was given as a gift to one of my Henderson ancestors in 1775). Any hints or info about the marks on the cup would be greatly appreciated.

https://photos.app.goo.gl/uLMw8xWRUiTrBiex5

https://photos.app.goo.gl/FzAgS1Z3tuyAFBj7A

[dognose]

Hi,

Welcome to the Forum.

Please embed your images as very few members will click on such links.

https://postimages.org (choose 'Share', then copy the 'Hotlink for forums' code) is recommended. Do not use Photobucket or Dropbox.

Trev.

[panmich]

Hi Trev,

Thank you for the guidance. Here (I hope) are the embedded images.

[Theoderich]

It is Tilsit in east prussia.
Maker is Johann Kownatzky sen.
(master < 1763 - 1796, ref. Scheffler Ostpreußen No. 439, 444, 454),

Yearsletter looks like h probably 1769, but I am not sure.

[panmich]

Hello Theoderich,

Thank you for this information. It is very meaningful to me, as it is now another piece of the puzzle of my family's history.

Michelle