This is a great subject. Thanks for starting it.
As a resident of Connecticut for 37 years, the New York, New Haven and Hartford Railroad has become a subject of considerable study, great interest, and the focus of my O-gauge model railroading. My under-construction 10-by-5 layout is just an oval but represents a New England branch line and operates almost exclusively with New Haven power and rolling stock. I believe that I have purchased every scale-sized O-gauge New Haven locomotive and piece of rolling stock that has been produced during the past twenty years. Photos of a few below.