Mercury Astronaut Scout neckercheif slide

[Rip Van Scouter 10]

I have a pewter color 1960's vintage neckerchief slide in the shape of a Mercury space capsule. The graphics on the slide include the mercury capsule with spacesuited Mercury astronaut standing behind both a Boy Scout (yellow enamel) and a Cub Scout (blue enamel). The boys are shoulder-to-shoulder and shown from waist up (as I remember). The astronaut is centered between and behind the boys.

 

Anyone know the background of this slide? It may have been from some event sponsored by McDonnell Aircraft, the prime contractor for the Mercury capsule program, here in St. Louis. McDonnell later merged with Douglas Aircraft (McDonnell-Douglas), and later merged into Boeing Corporation. The slide belonged to my older brother, but I acquired it when he did not continue in Cub Scouts.

 

Thanks!