Dear Jesus,

Thank you for contacting Mearto with your appraisal inquiry. My sincere apologies for the delay with the appraisal.

The presented object appears to be a painting made in oil or acrylic paint on canvas with unknown measurements. The painting depicts warships of the 17th or 18th century with Dutch flags. The painting is signed with the name "James". This artwork was made in the 20th century after older paintings.

Sadly no additional information for an artist with this name fitting in style and motif is given by reference books and databases. 
Comparable objects were recently offered and sold on the international auction market. 
This piece is in good condition and there is no serious damage visible in the images provided.
A fair market estimation would be between 250 to 500 USD.
This estimate is based on actual recent past recorded auction sales of comparable items. Retail "asking prices" can be higher and may vary.

With kind regards,

George