Question on these Dog Tags--- same name --- different numbers WW 1 & WW 2

[1st Sgt CES]

Hello Everyone---- Found these today---- same name --- different numbers----- two different wars---- never have seen this before--- any help will be great--- Thanks Mark

[Old Marine]

Father and son tags?  I think the WWII serial number beginning with the number 3 indicates a draftee.  I think WWI veterans were past the draft age.   

[AustinO]

Actually the same guy.  He was in the 108th Ambulance Company (with the 27th Division) in WWI, and was drafted for WWII in 1942 - received a new service number then. Looks like he got two "free" trips to Europe.

[Old Marine]

That’s pretty amazing.  You learn something new here every day.  Nice find.