Night Marching Compass

Similar to the "Night Marching" Compass by F. Barker & Son. Utilizes a white compass card with a large arrow for north and a sparse selection of cardinal points, surrounded by a silvered bearing ring - the card is visible through the cover. A movable bearing arrow on the knurled-edge crystal allows you to set a heading and then simply match up north with the pointer. Finer bearing readings were accomplished via the bail (missing, unfortunately) and a hairline in the glass window within the cover. A traveling stop freezes the compass card via a lever at the lower right.