I agree, very unusual. The center part surrounding lincoln and the date is raised . The outer part almost looks like a split planchet but in god we trust is clear and legible as is the date on the raised portion. The only distorted part is lincoln.
Definitely not a capped die. An acetone soak should remove the adhered substance, if not xylene will. The dark areas are stains and environmental damage
Think this through a minute. How is a coin going to have fully struck design but also raised areas after being struck with tons of force? It's not a planchet defect nor die chips/damage (which would leave a raised area. Nothing more than a damaged cent.
