This just in from garry Apgar:

[Might Walt be referring here to the camera he took with him on his Grand Tour of Europe in 1935?

"A few months ago I took a trip, combining business and pleasure, to the east, through the canal, Cuba, Florida, etc.  Before starting, my first thought was for a 16 mm. camera.  The result was the Victor, not alone for its convenient portability, but for the many technical features that my newsreel experience had taught me to value.  With it I managed to bring back many hundred feet of interesting films of my vacation.  And from it I learned that, once you’ve made a start in cinematography, you can’t stop—you’re a cinematographer for life."

Walt Disney, “Mickey Mouse and 16 mm.”
American Cinematographer, March 1932, p. 36]

Actually, the Victor model that Walt was refering to in this 1932 article was an older one than the one (model Four) that he took with him on the 1935 according to this ad.