This is a vintage, 20th century, Mid Century Modern style painting of a half length portrait of a Spanish Conquistador. The painting is signed O. Montenegro at the upper right. There is not a listed artist by this name. There are a few similar version of this Conquistador image, almost like a template painting with the same signature. This was possibly produced in a factory setting by a group of artists using a fictional name. This work is intended more as decorative wall art than fine art for investment purposes. The estimate is based on actual recent past recorded auction sales of comparables. Retail 'asking prices' can be higher and vary.