"City of Boston Hackney Carriage Driver" Badges

Hi! Here's a sampling of my collection of these great old badges. I've bought them mostly on ebay, but have also picked up a few from folks in my area. My main goal is to locate & buy (if possible) my Grampa's badge #2377. It was issued to him by the Boston PD in 1919. I'd gladly swap my whole collection of many, many of these badges for Grampa"s!!! Hope you all enjoy the images I've posted. Please feel free to share this info and pass the word for me!!! I'm on a mission and won't rest easy until his badge is in my hand. Thanks and happy collecting! Jim