I own an original etching by Marie Laurencin "jeune fille a la guitare". I have the number S325 written behind the frame with an authentication seal. I would like to know more about this etching and its estimated value.

Many thanks,
Tim Stater

There is no image attached with this post, so it is impossible to know more about this etching, nor anything about its value. The number S325 sounds like a lot number; the authentication seal is important but you don't describe what it says or what it looks like. Could you upload some images?

At the end of the day, a professional appraiser is the best person to answer the question of what it's worth in monetary terms. You can find one through an auction house.