My buddy, Clem of The Bronx, sent in photos of boxed "Healthknit Three Seasons" union suits for men and boys, added to this post October 13, 2022. Packaged four to a box.

"Knit to Fit" underwear suits as sold yesteryear...   

  

And, these union suits, unmarked and unknown but boxed:

Thanks, Clem!

More Boxed Union Suits from Yesteryear... before long, one-piece underwear was packaged, boxes were primarily used in selling men and boys' union suits.

See my previous "boxed underwear" posting, "All Boxed In"  April 11, 2022, the way union suits used to be sold.