New for '35, it's the Sternum Tickler. Surely they had zippers before 35, no? But the ad seems to instruct people on the benefits and features of a zipper - zip it's open! Zip it's closed! Even though "zip" features prominently in the copy, it's not called a Zipper; it's a "Flash Slide Fastener." They also look to be at least 18 inches long.

God help us if this style ever returns. God help us.