Almos idential to the one that came with my Burke #4.
https://www.ebay.com/itm/Vintage-in...153266?hash=item1cfddc3c32:g:QXIAAOSwIlJf91y8
https://www.ebay.com/itm/Vintage-in...153266?hash=item1cfddc3c32:g:QXIAAOSwIlJf91y8