And to show off the first of the “A” name Arrow collars from my eBay early 20th Century collar bag purchase, here is the Avolyn Collar, which is narrower than the Amolek and Ancover, with a wide spread:

The Arrow Avolyn is an easy to date collar, because it was not only heavily advertised in its first year by Cluett, Peabody & Co. (as their new collars were), but was widely reported to have been worn by the most famous man in America at the time of its launch. The style is a bit “retro” for 1907, looking almost like a throwback to earlier decades, but this style never really stopped as it was one that was more comfortable by being narrower and having a wide spread, especially for any older man with a thick neck. As a result this type of collar style never went completely “out” of use like more trendy styles.