E 201 later L 109 - original firehouse Bklyn FD Eng 1 - 635 (was 633) 4th Ave Bklyn - (E 201 1869-1891 and then L 109 1891-1939)
Don Holt's site:
http://nyfd.com/brooklyn_engines/engine_201.html
"Engine No. 1, as its number indicates, was organized when the Paid Department came into existence. It was installed in the house on Fourth Avenue, between Eighteenth and Nineteenth Streets, which, prior to that time, had been occupied by Putnam Engine No. 21, of the Volunteer Department, and remained there until Aug. 20, 1891, when it was reorganized and moved to a new building of better design and more ample accommodations on Fourth Avenue, between Fifty-first and Fifty-second Streets."
Original firehouse joined to structure next door (635) - currently occupied by Seafarers Intl Union.