ID this patch, ATC or RTC??

[SEAL Dad]

Can anyone ID this patch? It is either RTC or ATC.

[VNAMVET70]

RTC could be an acronym for "Recruit Training Command"

[jumpship]

WWI Era Railway Transportation Corps?

[MHD]

The US Army Patch Book 1st Edition,  Barry Jason Stein, plate 62A, has this patch identified as ROTC (pre WWII).  Other patches on this page actually spell out ROTC in a conventional manner...

[Uniforms of the Day]

Reserve Training Center. Early ROTC

 

[Wake1941]

Also for what it is worth, this is a patch king piece made in the 1940s for collectors / veterans.