Vintage Jewelry Designer of the Week - Who am I?

This is another in my ongoing guessing game series about popular vintage jewelry designers. I'll give you some clues and pictures and you see if you can guess which designer it is. Ready? Here are your clues:

• The dates of operation of the company are 1914 to the present day.
• The founder of the company emigrated from Austria in 1885
• Design Characteristics: use of Swarovski rhinestones and custom color rhinestones
• Used aeronautical glue in their designs
• Switched to the use of sterling silver in the war time years
• Many designs were rhodium plated
• Famous for Christmas tree designs
• Many whimsical designs from the 1940s are very collectible today

Here are some pictures of my designs:


I am considered a high end designer and very collectible today. For more information and the answer to today's riddle, you can go to this designer page of the resource library on my website Vintage Jewelry Lane. (answer is also shown reading backwards at the bottom of this blog post.)
I'll be doing more of these riddles over the next weeks and months. Have fun with the series. Answer: (read it backwards) grebnesiE