Vintage sealed box Baby Terry One Piece Sleep and Play Set (m)

Description

In the 1930's my friend's grandfather opened a general store in rural Washington state, eventually handing over the business to his two sons.  Now, well over half a century later, the store is closed and the family is sorting through the inventory still on the back shelves.  Most of the items are from the 1950's and still in their original boxes.   Many of the listings in my store came from those shelves.
Description
This is a vintage but never out of its box unsold item from my friend's store.  It is stretch fabric and flame resistant.  The tag says it's 80% Arnel Polyester (Tri-Acetate) and 20% Textured Polyester.  Machine wash warm.  Delicate cycle.  Tumble dry low.  Cool iron.  no chlorin bleach agents.
Made in the USA.
There is a cute embroidered animal (dog?) and striped cuffs.  Zippered.
I think it's rare to find baby clothes like this from the 1960s that are new.