A red felt heart tumbles open to reveal the civic pride of turn-of-the-century Marlboro, Massachusetts — this 1907 novelty pull-out postcard from Warner Publishing Co. conceals a cascading accordion strip of black-and-white photographic views behind its velvet-textured scarlet flap, secured with a small brass brad. Once the heart is lifted, the strip unfolds to show the handsome New City Hall with its clock tower, the Public Library, the bustling Main Street & R.R. Station scene, the N.Y.N.H.&H Railroad Station, Lake Williams, a striking trio of white draft horses, the Post Office & G.A.R. Building, and St. Ann's Academy — eight vignettes capturing a prosperous New England industrial city at the height of the Golden Age of postcards. The card is addressed on the reverse to a "Mrs. H. W. Nelson" with the sender identified as coming from Marlboro, and carries the Glazier Art Co., Boston imprint copyright 1907, with card no. 575 pencilled at lower right. The novelty format — a mailable heart with a hidden leporello of town views — was a clever marketing device that appealed to both local boosters and travelers; Marlboro was then a thriving shoe-manufacturing hub, and landmarks like the G.A.R. Building spoke to its strong Civil War veteran community. The felt heart retains good color and the brass brad is intact, making this a particularly charming example of Edwardian postal novelty engineering.