Hello! I'm new to the site

[wavenc]

My mom has 6 small plates(4 and 1/4 inch) in dameter, she had them for the last 45 years. They are dark blue with decorative gold.On the back it has "Made in Germany-echt Kobalt   MENAU   Grof von Henneberg  and another word that I can't  see that well. It olso has some numbers hand written on the back of plate. 
Any idea what they can be worth?
Thank you!

[Tim]

From your description, I believe this is JLMenau, Graf von Henneberg. In the Thuringia region of Germany. The mark may be a crown with the Henneberg coat of arrms?  Mark used circa 1934-1950. Replacement value you can check here:  http://www.replacements.com/

This mark was used on colbalt decorated pieces. No chips/cracks etc. perhaps retail $20-$30 each.
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best..........Tim