Hi
Do not know where your from. But would have to take to an art dealer and upmarket auction house etc
Some of these places have days for free valuations or advice on what you have.
Anything else because just intitials would be "Appartaining To" best get advice and if worth it pay for and get a valuation.
Best of luck art is a pain when comes to getting authentification. Even high end art dealers have been known to sell a fake because so well done.
