Styrene Siding - Novelty Drop Siding (12 x 24 x .040") -- .060" Spacing

Many buildings of the mid-19th to early-20th century used novelty siding, also known as shiplap or drop siding. It consisted of overlapping boards, with a rabbet in the bottom of each board, over-lapping in the round cove on the top of the board below. Part dimension indicates spacing.