oose said:Great shots, here is a civilian version in 1929, not leather I know but its got the style.
NickG said:Here's a link to an auction for a 1933 MONTGOMERY WARD and CO. catalog.
It explains (and illustrates) that even 3 years later in 1933 zipper closures were still new technology for garments. They are referred to as "slide fasteners", automatic slide fasteners and hookless slide fasteners, but not yet as "zippers".