Trying to identify Cobalt Stone with "ER" letters found on shore of Lake Michigan

by Dan
(The Woodlands, TX)

Cobalt Blue Stone with

Cobalt Blue Stone with

This piece of cobalt/navy sea glass was found on the shore of Lake Michigan, Near Winnetka, IL.

It has the letters "ER" on it and appears to be somewhere between cobalt and navy blue in color.

Any ideas of what the source was for this glass?


Comments for Trying to identify Cobalt Stone with "ER" letters found on shore of Lake Michigan

Click here to add your own comments

Dec 05, 2016
Cobalt "ER" possibility
by: Victoria

Probably Bromo Seltzer; made in Baltimore and packaged in a cobalt blue jar about 6 inches high high, round with a lip designed for a stopper not a cap. Nationally distributed.

Unfrosted version clear blue with high lumination. Widely imitated today

Full details can be found on the web.Search Bromo Seltzer and you will find the original building which has now been converted, I believe, to apartments.

You may find a close up of their bottle and be able to identify the font.

Dec 05, 2016
If it looks like a duck..
by: Momcat

I'm going with the obvious here, but a Bromo Seltzer bottle?

I grew up in Baltimore, as did Bromo Seltzer :) In the 60's they still had a huge blue bottle mounted on top of their downtown Baltimore HQ.

Google it and see if the font matches? I imagine there were different fonts over the years though.

Dec 04, 2016
Bromo seltzer
by: Anonymous

Did you see the link to this post on facebook? My sister found the SELTZ part of this glass 45 minutes to the north, in Kenosha, WI, on Lake Michigan! So cool!She posted a picture of it on Sea Glass Odyssey facebook post.

Dec 03, 2016
by: Miles

I'm pretty certain it is part of a Bromo-Seltzer bottle. Thry are that type of cobalt blue and the ones I have all have the long space between the ER. Emerson Drug Company made the product.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Identify Your Sea Glass.

Share this page:
Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.

OdysseySeaGlass relies on advertising to cover costs of sharing sea glass info from around the world. Purchasing from an ad on our site costs no more than directly and provides us with a few cents income.

You will see Google and Amazon ads as well a few other advertisers as you view our pages. .

Browse Our List of Recommended Sea Glass and Beach Books