Also found this:
Pennsylvania, WWI Veterans Service and Compensation Files, 1917-1919, 1934-1948 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2015.
https://search.ancestry.com/cgi-bin/sse.dll?indiv=1&dbid=60884&h=78580&tid=&pid=&usePUB=true&_phsrc=Qtu10056&_phstart=successSource
{{Ancestry Record|60884|78580}}
Russell A Stauffer |
Residence Age: |
34 |
Birth Date: |
26 Apr 1900 |
Birth Place: |
Philadelphia, Philadelphia, Pennsylvania |
Residence Date: |
1934-1948 |
Residence Place: |
Philadelphia, Philadelphia, Pennsylvania |
Military Branch: |
Army |
Record Type: |
Service Card |
Now this is his Service Card on file and not the Application Form. The form may have been filled out by the family as they would have been due any compensation he would have received if still alive. These cards do not note if the named veteran died between the war and 1933 when PA Compensation was offered. This is not the first time I have seen a Service Card for someone who died in the interim and list their age as if still living.
By the way it shows he did not serve overseas.