A traditional double sided carpenters sliding mortise gauge made from solid Rosewood. If there was ever a tool that looks like a piece of jewelry this would be it.
Contrasting with the rich dark rosewood you have inset brass wear plates, a knurled brass thumb screw lock and an inlaid brass head shield with a precision pin screw adjustment.
On one side, there's a single marking pin, on the other side there's an adjustable, double pin arrangement. The double pin side enables you to set up once and quickly mark multiple mortise positions from one face of the project piece.
Total size - ~8" long.
Made in the UK.