I think I have a Draft Registration Card for him.
The second photo is more of a representative of what you would see in what we call Class A uniforms.
Do you have a copy of the 1920 Census. If so then take a good look at it. There is a George Corbin who is eighteen years old. He fits the George Corbin you are talking about and he would have been born in about 1901 and would have been two young to go into service. The census was taken in January of 1920. If he were not born in January. He would have been only seventeen or eighteen at the end of the war in 1919.
He might have lied about his age; but I doubt he could get away with that.; but stranger things happen.
You should look at the last name of the two children of six years old and three months: (1.) George Sample- 6yrs old. (2.) Stella Sample.
If you look at the complete 1920 Census:
1. Dunton, Samuel Head Married 35 Married
2. Corbin, Alice Border 48 "
3. Corbin, Ida " 14 Single
4. Corbin, George " 18 "
5. Henderson, Joseph " 23 Married
6. Henderson, Louise " 23 Married
7. Henderson, Louise " 8/12
8. Sample, George " 6 Single
9. Sample, Stella " 3 4/12 Single
George and Stella are the children of a George Sample. Who appear in a family geneology later as George and Stella Sample Henderson. the children of Louise and Joseph Henderson. Who they most likely adopted them later or shortly in life. He probably died in the War. In most families some one takes over and takes care and adopts those kids and sometimes never adopts; but incorporates them into the family by just saying figuratively " you are welcome to live with us and you are apart of our family now".
I will research further. Take care. Danny