Made in Sheffield by Joseph Marples, this Rosewood 1:6 dovetail marker has a brass face and blued steel blade secured with three brass rivets.
Used for laying out dovetail joinery, the 1:6 ratio produces a stronger but perhaps less elegant joint than the 1:8 version. Often preferred for use on softer timbers, the 1:6 ratio is also good for concealed dovetails where strength is the only consideration.