SOLVED!
Private 1st class Sigmund "Frank" Piatasik from Buffalo, NY.
Born May 1, 1897, died Jan.29, 1962.
Enlisted date (Columbus Barracks, Ohio): July 21, 1916, discharged Dec.12, 1919, enlisted (probably volunteered) Dec.13, 1919, honourable discharged Jan.24, 1923
Grades: Mechanic May 17, 1917, Private July 10, 1919, Mechanic Aug.25, 1919
Stations:
H comp. 28th. Inf. to Jan.2, 1918
A comp, 3rd. MG-Btl. to Aug.12, 1919
MG comp., 8th. Inf. to discharge
Uniform:
Collar badge: Crossed rifles for infantry
A = 3rd army, later American Forces Germany
Chevron for Private 1st class, underneath patch for "Mechanic"
Six oversea-service-chevrons (for three years), overseas-service from Jun.12, 1917 until discharge
One service-stripe for three years service time in the army
In his records the name Frank is not mentioned. Probably he called himself "Frank" as a nickname, because Sigmund sounded too much "german"?
The 8th. Inf. first belonged to the 8th. Div. When the division was disbanned, the regiment remained in the AFG in Koblenz from June 1919 until Jan.25, 1923, when the "USAT St.Mihiel" left Antwerp and arrived Feb.7, 1923 in Savannah, Georgia
So he was discharged one day before he left Europe. I hope the state still paid for the crossing...😁