Your vintage original landscape painting dates to the 3rd quarter of the 20th century, 1950’s - 1970’s.
It is by what is known as an unlisted artist, meaning one that does not sell at auction for fine art collector and investor purposes, but a painting that is more intended for decorative framed original wall art for the home, hotel or lobby setting. Oftentimes, the artist’s name that is on the painting is fictitious and they painted in factory settings in Mexico and China. They were sold in decorator shops, furniture show room stores and department store furniture sections.
Your vintage framed oil painting would sell for $125 - $300 on today’s market. They do get offered for higher on online auction sites, but the realistic sales prices are lower than asking price. The suggested insurance, or replacement value is $400.