And to round out the “A” name Arrow collars from the eBay early 20th Century collar bag purchase, there is also the Avolyn Collar, which is narrower than the Amolek and Ancover:

This too can be reproduced by printing out the scan of the two halves of this collar onto an 8.5×11 piece of paper and adjusting the overlap of the pieces to the correct neck size you want for making a pattern.