Is This Strip Of Switzerland Sc. #228 From A Sheet?

I see a double selvage and then the last two stamps in the strip are inverted. Is this common?

Non expert, a guess to see if I am close.
Not seen multiples (in sheet form) before.

This is an Interpanneau gutter, possibly perforated, so as to prevent
illegal usage of the resultant gutter size.
Tete beche as per the printing die design.

A dedicated Swiss specialists catalogue should cover these.

Tête-bêche. Not uncommon.

Many countries lay out and print sheets in this type of orientation to use in the production of booklets. No doubt, they often sell the full sheets to collectors.

There was a Linn's article about this series of stamps several year's back.
https://www.linns.com/news/world-st...ilately.html
This picture of a full sheet was in the article.

and the caption read "Se-tenant printing combinations of the Swiss Landscape definitives are affordable and attractive. All originate from 90-stamp printing sheets created to furnish booklet panes, then cut so that the selvage can bind the booklets. Whether perforated through or overprinted with rows of "Xs," the purpose was to prevent usable unprinted stamp paper from falling into fraudulent hands.
"

Thank you pnj

thanks Guys! Great info!