Planzeiger manufactured code

[schokakola]

Do you know the "ESERO" code or manufacturer ?
There is no date too on this planzeigers.
What do you think about them ?

thanks a lot.

<a data-flickr-embed="true" href="https://www.flickr.com/photos/29606028@N05/22289603072/in/dateposted-friend/" title="unknow manufactured code"><img src="https://farm1.staticflickr.com/663/22289603072_f302e706e7_b.jpg" width="1024" height="680" alt="unknow manufactured code"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

<a data-flickr-embed="true" href="https://www.flickr.com/photos/29606028@N05/22289603102/in/dateposted-friend/" title="unknow manufactured code"><img src="https://farm6.staticflickr.com/5780/22289603102_f8799e268d_b.jpg" width="838" height="1024" alt="unknow manufactured code"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

<a data-flickr-embed="true" href="https://www.flickr.com/photos/29606028@N05/21679776264/in/dateposted-friend/" title="unknow manufactured code"><img src="https://farm1.staticflickr.com/617/21679776264_4617c2b519_b.jpg" width="1024" height="835" alt="unknow manufactured code"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>