Bath & Hammondsport
Originally serving as a connection between the Class 1 railroads running through Bath and the businesses of Hammondsport, NY, much of this railroad still operates today. Under the name B&H Rail Corp, and with affiliate railroad Livonia Avon & Lakeville, they maintain a small fleet of vintage Alco Century-series locomotives. To my understanding, they still own both S2s represented here on the mugs.