Silver-plate mark with Christmas tree in square cartouche with letters E, P and I

[djm1976]

https://photos.app.goo.gl/Bu5qxa9TOJhKCosX2

So I have these goblets that are engraved with a coat-of-arms depicting a castle and the year "1582". I have searched high and low to identify the markings on the underside that looks to me like a Christmas tree with the letters E, P and I in a square cartouche.
Any help you can lend would be so greatly appreciated!
Thanks in advance,
David

PS - if anyone also knows any good resources for identifying coats-of-arms please let me know OR if you have any thoughts on this!

[dognose]

Hi,

Welcome to the Forum.

You will have far more chance of getting a response if you embed your images as very few members will click on such links.

Trev.