I was assigned to the 30th Artillery Brigade on Okinawa in 1970. The Oozlefinch was somewhat known within the unit. The 30th is the lineal descendent of the WW1 Railway Artillery Reserve. When it was reactivated in the early 1960s, the Institute of Heraldy suggested the unit wear a version of their old WW1-1920's Oozlefinch SSI. The commander vetoed that idea. I have always regretted not having the opportunity to wear the glorious Oozlefinch.

he seems to still be open-  he is on FB maybe try there? https://www.facebook.com/p/Doughboy-Military-collectables-100047322469705

Does anyone know this seller? They still have a bad configuration of his email box... 

My brother has lived in Lancaster for a decade and only now have I finally made it to the show.  Well worth it, even with the heat this year.   In a way....  As atb answered, it was the Coast Artillery mascot and now Air Defense Artillery.  I've used it as my name for collecting/militaria forums for twentyish years because of my coast artillery obsession.

Makes sense, Thank you

I recall when the unit was activated at Ft. Wainwright in 1972. I was assigned to the S2/3 section of the installation HQ, and there was activity to have some range area prepared for the Cobras to use.

Yes on Male doctors and Psychiatrists (also doctors).   US Army officers (which included doctors) wore the standard officer uniforms.  Army officers (Navy, too) had to procure their own uniforms.  There were field uniforms which looked mostly the same as enlisted field uniforms and dress uniforms, which were somewhat similar to enlisted, but different.  There are plenty of books and websites you can search for the styles and  nuances of the various types of uniforms.    Start here: https://www.usww2uniforms.com/news.html  

The mythical and mysterious Oozlefinch is the mascot for Coast Artillery and Air Defense Artillery.

US patches made in Canada, never  heard of that.

Very nice items.   Lived in Harrisburg for 30 years and never made it to the Reading Show but did volunteer work at the museum.   Is the Oozelfinch like a Distlefink?