Colt T-12 Pen Gun ( lemmy.world )
https://www.rockislandauction.com/detail/78/3511/colt-t12-espionage-pen-gun-in-12mm-with-wooden-storage-box
https://www.rockislandauction.com/detail/78/3511/colt-t12-espionage-pen-gun-in-12mm-with-wooden-storage-box