Also discovered recently on ebay is this great shot of Clarence Nash which I had never seen before. The caption read:

"1950s Buffalo, NY. visit of The Mickey Mouse Club to WGR-TV, sponsored by the Atlantic dealers. "Ducky" Nash, Donald Duck, Capt. Bob Lawrence, Mickey and Corky."

In the comments to this post David Lesjak adds:

[Clarence Nash and Florence Gill (the voice of Clara Cluck) traveled to Canada on June 20, 1941, where they did some live radio bond promotion gigs in Toronto. I'd be interested in hearing from anyone who has knowledge of this trip.]

I would too.