Hello and welcome! My name is Doris.
I have been an antiques collector, dealer and appraiser for over 56 years.
I will be pleased to help you.
Please know that I cannot accept any requests for "live conversations" such as phone calls. I must research up-to-date data to give the most accurate answer.
Besides there are extra system charges to you for live conversations.
I cannot locate an artist by the name of Grifoll Spain in any of the 6 art databases I use. I will need to value his/her painting as being by an unlisted artist. This does not mean the painting is not well-done. It simply means the artist has not been nationally or internationally recognized nor has any artist by that name taken part in a major exhibit.
I can locate Paul R Koehler.
If you wish I can value your Spain painting as being by an unlisted artist and the Koehler painting as being by a listed artist.
If this is satisfactory for you, please let me know.
PS: Meanwhile, please don't rate me until you get a full appraisal and a value from me. I mention this because you may get random prompts asking you to rate me before I've submitted an answer. Ignore them. They are automatically generated by the system (it doesn't seem to be able to distinguish an answer from preparatory back-and-forth and information gathering) and don't come from me.