The 737 “No. 1” model was the call that started it all. This is the single reed call that doesn’t leave the lanyard. From vast open water setups to tight forested sloughs, the “No. 1” is a do-it-all, get-it-done call. With lots of range, it has the ability to get super loud for those high ringing hails, but still has a raspy bottom-end all the way down to those ultra soft confidence quacks.