The exact location of the Old Chum showing is not known. The showing is assumed to be close to the centre of the former Old Chum claims that were located along the south side of Hartley Gulch, about 16 kilometres east-northeast of Stewart.

The area is underlain by Middle-Upper Jurassic Hazelton Group rocks comprising mainly north-striking volcaniclastics, sandstones, siltstones and argillites.

At an elevation of 1006 metres, a tunnel exposes an east trending crushed zone in argillite. A 1.2 metre wide quartz vein, accompanied by fault gouge along the vein margins, occurs in the zone. The vein carries arsenopyrite, galena and chalcopyrite. A sample across 1.2 metres of the vein assayed 226.3 grams per tonne silver and 1.67 grams per tonne gold ($1 per ton gold) (Minister of Mines Annual Report 1910).

About 37 metres above the tunnel and 50 metres to the south, an opencut exposes a 2 to 3 metre wide crushed zone containing chalcopyrite and lesser galena. Gold and copper values have been reported from this location (Minister of Mines Annual Report 1910).

The Old Chum claim group was staked before 1910 by Lydden, Hartley and Lade. During 1910-12, a 10 metre long tunnel and at least four opencuts were emplaced on the claims. No further work has been reported. Bond Gold optioned the Kai property in 1989 and conducted mapping and sampling in 1991. It is assumed that the Old Chum workings occur on the Kim claims of the Kai property, though no workings were located.