Numbers and name on duffel bag

Hi,
I'm from Germany and I have a duffel bag (hope this is what they are called) that I inherited from my grandfather. He was a soldier in El Alamein and a prisoner of war somewhere around Lake Michigan.

There's a name and some numbers on the fabric:
James Reaves
33641274
and
U.S.
RM-333 (a)-29

Since he came back after the war ended, I think this was a duffel bag no longer in use wich was given to him to transport his belongings back to Germany. The other possibility is that he simply stole it which wouldn't be that far fetched

I'd love to find out, who this bag belonged to or at least, in wich force or company he served. I've attached some pictures of the bag. Maybe someone can help me. The greatest thing for me of course would be to tell the family of this soldier that I have his duffel bag. Thank you!

 

James Reaves enlistment record:


Field Title Value Meaning
ARMY SERIAL NUMBER 33641274 33641274
NAME REAVES#JAMES############ REAVES#JAMES############
RESIDENCE: STATE 33 VIRGINIA
RESIDENCE: COUNTY 003 ALBEMARLE
PLACE OF ENLISTMENT 5174 SHELBYVILLE INDIANA
DATE OF ENLISTMENT DAY 01 01
DATE OF ENLISTMENT MONTH 12 12
DATE OF ENLISTMENT YEAR 45 45
GRADE: ALPHA DESIGNATION CPL# Corporal
GRADE: CODE 6 Corporal
BRANCH: ALPHA DESIGNATION FA# Field Artillery
BRANCH: CODE 30 Field Artillery
FIELD USE AS DESIRED # #
TERM OF ENLISTMENT 3 Enlistment for Hawaiian Department
LONGEVITY ### ###
SOURCE OF ARMY PERSONNEL 6 Enlisted Man, Philippine Scout or recall to AD of an enlisted man who had been transferred to the ERC
NATIVITY 33 VIRGINIA
YEAR OF BIRTH 24 24
RACE AND CITIZENSHIP 2 Negro, citizen
EDUCATION 2 2 years of high school
CIVILIAN OCCUPATION 590 Undefined Code
MARITAL STATUS 6 Single, without dependents
COMPONENT OF THE ARMY 1 Regular Army (including Officers, Nurses, Warrant Officers, and Enlisted Men)
CARD NUMBER # #
BOX NUMBER 0688 0688
FILM REEL NUMBER 1.205 1.205

 

Oh wow... thank you so much. That's more than I could have hoped for.

 

For reference, WWII Enlistment records can be found here:
NARA - AAD - List of Series - Wars/ International Relations: World War II