Dear Bebe,

Thank you for your request. This is an offset or color lithograph print by the artist Leonardo Nierman, with the title "Billowing Sails". It has the measurements of 28" x 36" and is probably an offset print. The Mexican artist Leonardo Niemann was born in 1932 and is mostly known for abstract paintings and sculpture. This print is signed "in the plate" meaning the signature is part of the print and not hand signed.
An estimation would be between 50 to 100 USD.
This estimation is based on actual recent past recorded auction sales of comparables. Retail "asking prices" can be higher and vary.

With best regards,
Georg