It was a trademark for a line of school uniforms originally manufactured by
Missouri-based Elderwear, which has also offered other Mark Twain themed
lines.. The company was founded in 1916 and the style has a twenties look
to it. That's all I could find on their internet page (they still make
school uniforms) but writing to the company might produce more information.
https://www.facebook.com/pg/Elder-Manufacturing-Company-Inc-795874147130153/about/?ref=page_internal

Martha Sherwood

On Thu, Jul 30, 2020 at 9:58 AM Shannon, Edward <[log in to unmask]> wrote:

> Does anyone have an idea when the term "Becky Thatcher" was adopted to
> describe elementary school dresses for girls? Does anyone have
> documentation regarding this?
>
> Thanks for any help.
>
> --
>
> Edward A. Shannon, PhD
> Professor of Literature
> Office B207
>
> https://www.ramapo.edu/major-literature/
> School of Humanities and Global Studies/Ramapo College of New Jersey
> 505 Ramapo Valley Rd./Mahwah, NJ 07430
> (201) 684-7425 Phone/ (201) 684-7973 Fax
>
> "It is a worthy thing to fight for one's freedom;
>
> it is another sight finer to fight for another man's." Mark Twain
>