A1 Special gold inlay in Askins book

[Robert Delk]

Please excuse me for asking this but what is the gold inlay on the A1 shown in the front of "Modern Shotguns and Loads" by Capt. Askins? There is a copy for sale on ebay and I can't make out what the inlay is. It kinda looks like a unicorn and it is driving me nuts trying to figure out what it is.

[Researcher]

It looks like a Unicorn in my copy.

[Robert Delk]

Is the location of this gun known? Has it been seen in the last 70 years? Looks like a smallbore gun from the pictures. I have no idea where my copy of the book is hence the questions.