help on age of painting of the Alamo and what it is worth

[GB1]

my dad has had this painting for a long time the artist's signature is E.Mount and on the back there is two numbers #22 and #25 i think they are auction number lots thank you for your help ,Gold boy

 

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[Anduril]

To my eye, that's the Republic of Texas national flag (identical to the modern version), adopted in Jan 1839.
So, no earlier than that.

And I guess technically, you can rule out years 1840 for having a different flag (Republic of the Rio Grand flag, at least in Laredo), and the Civil War years of 1861-1865 which had the 7 stars and 3 stripes.

And, since there's no Haagen-Dazs ice cream shop in the painting, no later than about 1977.

 

[GB1]

To my eye, that's the Republic of Texas national flag (identical to the modern version), adopted in Jan 1839.
So, no earlier than that.

And I guess technically, you can rule out years 1840 for having a different flag (Republic of the Rio Grand flag, at least in Laredo), and the Civil War years of 1861-1865 which had the 7 stars and 3 stripes.

And, since there's no Haagen-Dazs ice cream shop in the painting, no later than about 1977.

thanks