Hello and welcome! My name is Doris.I have been an antiques collector, dealer and appraiser for over 56 years.I will be pleased to help you.
You may be posting on the wrong site. We are an appraisal site, not a selling site.
If you wish an appraisal, I need a photo of the marks on your goblet.
You may need to use the macro function (flower icon) of your camera to get a good clear photo of the marks.
If you cannot get a good photo, then sketch the marks and take a photo of the sketch.
To send photos you may use the "attach" or "add" link or "paper clip" you see on your reply page.
Unfortunately, I cannot find an accurate answer for your question. I will release your question so that all the other professionals can choose to answer you with accuracy.I want you to have the best answer possible. Please do not rate me down because I released your question. Releasing your question is called "opting-out." I will not be able to respond to you once I opt-out.I am very sorry.
Does your Goblet say Sterling Silver on it anywhere? Or have a mark for Sterling Silver?