Craig, NASM doesn't show it in inventory. Do you recall where you saw
the photos?

Could you be thinking of the Ellsworth Polar Star Antarctic Explorer?
That one is in NASM now. Ellsworth donated the Polar Star to the
Smithsonian in 1936.

Thanks for the response! Please let me know if you recall any other
details. I'll get cracking on a search based on your info.

Dillon