L 103 former quarters 183 Concord St - organized as L 3 Brooklyn Fire Dept in 1869 at 236 Gold St - new quarters at 183 Concord St in 1875 - became L 3 FDNY in 1898 - became L 53 FDNY in 1898 - became Ladder 103 in 1913 - remained at 183 Concord St until 1932 move to Sheffield Ave
From "Our Firemen - The Official History of the Brooklyn Fire Dept"
- - TRUCK COMPANY NO. 3, THE MEN WHO FIGHT AT CLOSE QUARTERS.
Truck Company No. 3, which at present is stationed at No. 183 Concord Street, was organized on Sept. 15, 1869, and occupied the house at No. 236 Gold Street, which was formerly used by Volunteer Engine No. n and later by
Volunteer Truck No. 2. That house was a two-story brick building, 20 x 50 feet; the whole first floor was used as an apparatus-room, with two stalls in the rear for the horses, the second floor being fitted up as sleeping
apartments for the officers and men. On April 29, 1874. the company removed to its present quarters on Concord Street, a two-story brick building. 25x75 feet. The apparatus-room has three stalls in the rear, and has lately been
supplied with a patent extension ladder.
http://nyfd.com/brooklyn_engines/engine_290/engine290_history.pdf